SOLUTION
From the formula given we have that
[tex]\begin{gathered} \frac{P_1}{P_2}=\frac{V_2}{V_1} \\ Now\text{ substitute } \\ P_1=36.5,P_2=84.1,V_2=0.0447\text{ into the equation, we have } \end{gathered}[/tex]V1 as
[tex]\begin{gathered} \frac{36.5}{84.1}=\frac{0.0447}{V_1} \\ cross\text{ multiplying we have } \\ 36.5V_1=0.0447\times84.1 \\ V_1=\frac{0.0447\times84.1}{36.5} \\ V_1=0.1029937 \end{gathered}[/tex]Hence the answer is
[tex]V_1=0.1030\text{ }m^3[/tex]