Finding the Fourth Proportional to 156,722.50, 216,270.98 and 85,100.92

Step by Step Solution

1. Step 1: Write the proportion equation
   156,722.50 : 216,270.98 = 85,100.92 : x
2. Step 2: Convert to fraction form
   156,722.50/216,270.98 = 85,100.92/x
3. Step 3: Cross multiply
   156,722.50x = 216,270.98 × 85,100.92
4. Step 4: Simplify right side
   156,722.50x = 18,404,859,367.30
5. Step 5: Solve for x
   x = 18,404,859,367.30/156,722.50
6. Step 6: Final answer
   x = 117,435.97