Finding the Fourth Proportional to 99,929.38, 137,807.24 and 65,422.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99,929.38 : 137,807.24 = 65,422.62 : x
2. Step 2: Convert to fraction form
   99,929.38/137,807.24 = 65,422.62/x
3. Step 3: Cross multiply
   99,929.38x = 137,807.24 × 65,422.62
4. Step 4: Simplify right side
   99,929.38x = 9,015,710,695.77
5. Step 5: Solve for x
   x = 9,015,710,695.77/99,929.38
6. Step 6: Final answer
   x = 90,220.82