Finding the Fourth Proportional to 99,497, 137,422.50 and 65,904.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,497 : 137,422.50 = 65,904.68 : x
2. Step 2: Convert to fraction form
   99,497/137,422.50 = 65,904.68/x
3. Step 3: Cross multiply
   99,497x = 137,422.50 × 65,904.68
4. Step 4: Simplify right side
   99,497x = 9,056,785,887.30
5. Step 5: Solve for x
   x = 9,056,785,887.30/99,497
6. Step 6: Final answer
   x = 91,025.72