What resolution would be center with one 1440x900 and two 1920x1080?

[Darklight101]

I have 3 screens with the resolutions said in the title. The 900p is the left screen and the other 1080p's being the centre and right screens.

I'm trying to make a 3 screen wallpaper but im unsure on what resolution I should set it to be in order to be centred on the middle screen. Because all downloaded wallpapers that are meant for 3 1080's are off centre and its annoying af

 

[hang-the-9]

Use the lowest resolution wall paper which is for the 900 screen, it should center on the larger screens with a black border around it.

 

[pasow]

the width of your display space is 5520 pixels wide by 1080 pixels tall. the screen of the smaller resolution will be adjusted center, bottom or top from the 1920x1080 displays. to fit a wallpaper exactly on your displays you will want one that is 5520x1920 and to set your wallpaper to "tile" mode.

for visual reference, here's a mock-up. the black space would be the displayed space, the white the off display.
http://imgur.com/kgwMMGu

if you wanted to modify any old 3 screen wide "1080p" background to work, just lop 240 pixels off the left side to get the correct width and realize the smaller display will crop from either the top or the bottom a bit.