What is the solution to the proportion?

Question

4/12=10/x

x = 3
x = 3.3
x = 4.8
x = 30

Answer 1

4/12=10/x

Cross multiply and solve for x.

4x = 120

x = 120/4

x = ?

Answer 2

30?

Answer 3

4/12=10/x 4x/4=120/4 x=30

Answer 4

thanks