Finding the Fourth Proportional to 156,757.50, 216,327.72 and 85,137.54

Step by Step Solution

1. Step 1: Write the proportion equation
   156,757.50 : 216,327.72 = 85,137.54 : x
2. Step 2: Convert to fraction form
   156,757.50/216,327.72 = 85,137.54/x
3. Step 3: Cross multiply
   156,757.50x = 216,327.72 × 85,137.54
4. Step 4: Simplify right side
   156,757.50x = 18,417,609,914.61
5. Step 5: Solve for x
   x = 18,417,609,914.61/156,757.50
6. Step 6: Final answer
   x = 117,491.09