P2720DC, U2412M, Latitude 7480, connection, 3 displays

@erz_danno  Follow-up to my reply above: If you were planning to use a regular USB-C connection between the system and the P2720DC in order to get video, USB data, and power all over a single cable, then unfortunately you won't be able to set up a daisy chain like I described above, at least not in a way that will allow you to run both displays at maximum functionality.  The P2720DC will set up the USB-C link to carry both video and USB 3.x data.  Carrying USB 3.x data cuts available video bandwidth in half.  With a Latitude 7480, that's still enough to run the P2720DC (which is why the display sets up the link that way), but it's not enough to run that QHD display plus an additional FHD display.  Dell's higher-end U Series displays, including the U2719DC that would be the nearest equivalent to your P2720DC, have a "USB-C Prioritization" option that allows you to choose whether the display should set up the USB-C link to carry USB 3.x data and half video bandwidth, or only USB 2.0 data and maximum video bandwidth.  If you had that option and were ok with only having USB 2.0 data speeds available for whatever you were plugging into your display's USB ports -- which might be fine depending on what you'd plug in -- then you COULD set up a QHD+FHD daisy chain even while using native USB-C to the first display.  But the P2720DC doesn't offer that.

So unless returning the P2720DC and getting a U2719DC instead would be an option, if you want to use the P2720DC via native USB-C to carry power, USB data, and video simultaneously, then you'll need to connect the U2412M via the system's built-in HDMI output instead, using an HDMI to DVI adapter/cable (not HDMI to DisplayPort, which won't work in this setup).  Or if your Latitude 7480 has Thunderbolt 3, which is optional on that model, you could get a Thunderbolt dock like the WD19TB and carry power, USB 3.x data, and enough bandwidth to drive both displays all over a single cable -- but that's obviously a more expensive solution, even assuming your laptop has TB3.