Set up a proportion and solve for X plz help

Answer:
x = 3.6
Step-by-step explanation:
In similar triangles, ratio of corresponding sides are equal
[tex]\frac{EF}{BC} =\frac{ED}{AB}\\\\\frac{x}{2.4}=\frac{6}{4}\\\\x = \frac{6}{4}*2.4[/tex]
x = 6 * 0.6
x = 3.6