[tex]\begin{array}{ccll} lbs&\$\\ \cline{1-2} \frac{3}{4}&2.85\\[1em] 9&x \end{array}\implies \cfrac{~~ \frac{3}{4}~~}{9}=\cfrac{2.85}{x}\implies \cfrac{~~ \frac{3}{4}~~}{\frac{9}{1}}=\cfrac{2.85}{x}\implies \cfrac{3}{4}\cdot \cfrac{1}{9}=\cfrac{2.85}{x} \\\\\\ \cfrac{1}{4}\cdot \cfrac{1}{3}=\cfrac{2.85}{x}\implies \cfrac{1}{12}=\cfrac{2.85}{x}\implies x = 34.2[/tex]
