Finding the Fourth Proportional to 156,522.71, 234,780.15 and 85,514.33

Step by Step Solution

1. Step 1: Write the proportion equation
   156,522.71 : 234,780.15 = 85,514.33 : x
2. Step 2: Convert to fraction form
   156,522.71/234,780.15 = 85,514.33/x
3. Step 3: Cross multiply
   156,522.71x = 234,780.15 × 85,514.33
4. Step 4: Simplify right side
   156,522.71x = 20,077,068,132.18
5. Step 5: Solve for x
   x = 20,077,068,132.18/156,522.71
6. Step 6: Final answer
   x = 128,269.36