If you encounter the following error on google earth update on ubuntu, the fix below can be applied to resolve it.
Fix
open terminal and type
sudo gedit /etc/apt/sources.list.d/google-earth-pro.list
Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'http://dl.google.com/linux/earth/deb stable InRelease' doesn't support architecture 'i386'
open terminal and type
sudo gedit /etc/apt/sources.list.d/google-earth-pro.list
Locate this line and edit it as given below
deb http://dl.google.com/linux/earth/deb/ stable main
edit as
deb [arch=amd64] http://dl.google.com/linux/earth/deb/ stable main