Finding the Fourth Proportional to 71,669,064.96, 98,676,786.65 and 65,123,151.15

Step by Step Solution

1. Step 1: Write the proportion equation
   71,669,064.96 : 98,676,786.65 = 65,123,151.15 : x
2. Step 2: Convert to fraction form
   71,669,064.96/98,676,786.65 = 65,123,151.15/x
3. Step 3: Cross multiply
   71,669,064.96x = 98,676,786.65 × 65,123,151.15
4. Step 4: Simplify right side
   71,669,064.96x = 6,426,143,291,678,636
5. Step 5: Solve for x
   x = 6,426,143,291,678,636/71,669,064.96
6. Step 6: Final answer
   x = 89,664,115.13