X/6=36/24 what value of x makes this proportion true

Cross multiply or just multiply both sides by 24
24x/6=36
4x=36
divide both sides by 4
x=9

X/6=36/24
=> here we can do cross multiplication ...
=> 24*x = 36 * 6 
=> 24x = 216 
=> x = 216/24 
=> x = 9 ..

and you can also first reduce the numbers into their simplest forms and then solve

hope it helps !!!