\(A=\frac{39}{7.16}+\frac{65}{16.31}+\frac{32}{31.43}+\frac{26}{43.99}\)
\(A=\frac{39}{112}+\frac{65}{496}+\frac{32}{1333}+\frac{26}{4257}\)
\(A=\frac{104}{217}+\frac{32}{1333}+\frac{26}{4257}\)
\(A=\frac{4696}{9331}+\frac{26}{4257}\)
\(A=\approx\text{0.509376261814371}\)