Finding the Fourth Proportional to 156,707.31, 216,250.03 and 85,085.69

Step by Step Solution

1. Step 1: Write the proportion equation
   156,707.31 : 216,250.03 = 85,085.69 : x
2. Step 2: Convert to fraction form
   156,707.31/216,250.03 = 85,085.69/x
3. Step 3: Cross multiply
   156,707.31x = 216,250.03 × 85,085.69
4. Step 4: Simplify right side
   156,707.31x = 18,399,783,204.22
5. Step 5: Solve for x
   x = 18,399,783,204.22/156,707.31
6. Step 6: Final answer
   x = 117,414.96