Original price: x
36% of the original price: $223.20
Then, taking the percentage of the original price:
[tex]\begin{gathered} 36\text{\% of }x=\frac{36}{100}\cdot x=223.20 \\ x=\frac{223.20\cdot100}{36} \\ \Rightarrow x=\text{ \$}620 \end{gathered}[/tex]