Finding the Fourth Proportional to 99,321.60, 137,105.28 and 65,832.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,321.60 : 137,105.28 = 65,832.96 : x
2. Step 2: Convert to fraction form
   99,321.60/137,105.28 = 65,832.96/x
3. Step 3: Cross multiply
   99,321.60x = 137,105.28 × 65,832.96
4. Step 4: Simplify right side
   99,321.60x = 9,026,046,414.03
5. Step 5: Solve for x
   x = 9,026,046,414.03/99,321.60
6. Step 6: Final answer
   x = 90,876.97