Finding the Fourth Proportional to 99,636,520.29, 137,481,369.61 and 57,810,997.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,636,520.29 : 137,481,369.61 = 57,810,997.20 : x
2. Step 2: Convert to fraction form
   99,636,520.29/137,481,369.61 = 57,810,997.20/x
3. Step 3: Cross multiply
   99,636,520.29x = 137,481,369.61 × 57,810,997.20
4. Step 4: Simplify right side
   99,636,520.29x = 7,947,935,073,575,876
5. Step 5: Solve for x
   x = 7,947,935,073,575,876/99,636,520.29
6. Step 6: Final answer
   x = 79,769,295.94