Finding the Fourth Proportional to 156,110.50, 215,432.49 and 89,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,110.50 : 215,432.49 = 89,042.50 : x
2. Step 2: Convert to fraction form
   156,110.50/215,432.49 = 89,042.50/x
3. Step 3: Cross multiply
   156,110.50x = 215,432.49 × 89,042.50
4. Step 4: Simplify right side
   156,110.50x = 19,182,647,490.83
5. Step 5: Solve for x
   x = 19,182,647,490.83/156,110.50
6. Step 6: Final answer
   x = 122,878.65