Finding the Fourth Proportional to 72,235,064.72, 99,679,481.60 and 39,642,116.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,235,064.72 : 99,679,481.60 = 39,642,116.24 : x
2. Step 2: Convert to fraction form
   72,235,064.72/99,679,481.60 = 39,642,116.24/x
3. Step 3: Cross multiply
   72,235,064.72x = 99,679,481.60 × 39,642,116.24
4. Step 4: Simplify right side
   72,235,064.72x = 3,951,505,596,330,141
5. Step 5: Solve for x
   x = 3,951,505,596,330,141/72,235,064.72
6. Step 6: Final answer
   x = 54,703,427.09