Finding the Fourth Proportional to 156,636.52, 216,158.60 and 85,016.56

Step by Step Solution

1. Step 1: Write the proportion equation
   156,636.52 : 216,158.60 = 85,016.56 : x
2. Step 2: Convert to fraction form
   156,636.52/216,158.60 = 85,016.56/x
3. Step 3: Cross multiply
   156,636.52x = 216,158.60 × 85,016.56
4. Step 4: Simplify right side
   156,636.52x = 18,377,060,586.42
5. Step 5: Solve for x
   x = 18,377,060,586.42/156,636.52
6. Step 6: Final answer
   x = 117,322.96