Help! Practice question! I don't know where to begin. Second time asking, help!

let that be x
Use proportionality theorem
[tex]\\ \rm\rightarrowtail x^2=32(18)[/tex]
[tex]\\ \rm\rightarrowtail x^2=576[/tex]
[tex]\\ \rm\rightarrowtail x=\sqrt{576}[/tex]
[tex]\\ \rm\rightarrowtail x=24m[/tex]