Finding the Fourth Proportional to 99,710.38, 137,651.10 and 76,998.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,710.38 : 137,651.10 = 76,998.38 : x
2. Step 2: Convert to fraction form
   99,710.38/137,651.10 = 76,998.38/x
3. Step 3: Cross multiply
   99,710.38x = 137,651.10 × 76,998.38
4. Step 4: Simplify right side
   99,710.38x = 10,598,912,049.35
5. Step 5: Solve for x
   x = 10,598,912,049.35/99,710.38
6. Step 6: Final answer
   x = 106,296.98