We know that 6 pounds cover 366 square feet, then we have the ratio:
[tex]\frac{6}{366}[/tex]Let x be the amount we need to cover 4392 square feet, then we have the ratio:
[tex]\frac{x}{4392}[/tex]Since the ratios have to be equal we have the proportion:
[tex]\frac{x}{4392}=\frac{6}{366}[/tex]Solving for x we have:
[tex]\begin{gathered} \frac{x}{4392}=\frac{6}{366} \\ x=4392\cdot\frac{6}{366} \\ x=72 \end{gathered}[/tex]Therefore, 72 pounds are nedded for 4392 sq ft.