Answer:
4.08
Explanation:
When you have questions like this, what you want to do is isolate the x.
How do you isolate the x in this case? Since both sides are equivalent (that's what the equal sign means, right? :P), what you do to one side you do to the other.
To isolate the x, you want to divide both sides by .9.
3.672/.9 = 4.08.
x = 4.08.