Finding the Fourth Proportional to 99,538.12, 137,501.92 and 69,308.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,538.12 : 137,501.92 = 69,308.31 : x
2. Step 2: Convert to fraction form
   99,538.12/137,501.92 = 69,308.31/x
3. Step 3: Cross multiply
   99,538.12x = 137,501.92 × 69,308.31
4. Step 4: Simplify right side
   99,538.12x = 9,530,025,696.96
5. Step 5: Solve for x
   x = 9,530,025,696.96/99,538.12
6. Step 6: Final answer
   x = 95,742.47