Finding the Fourth Proportional to 156,978.52, 216,625.62 and 89,001.70

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978.52 : 216,625.62 = 89,001.70 : x
2. Step 2: Convert to fraction form
   156,978.52/216,625.62 = 89,001.70/x
3. Step 3: Cross multiply
   156,978.52x = 216,625.62 × 89,001.70
4. Step 4: Simplify right side
   156,978.52x = 19,280,048,443.55
5. Step 5: Solve for x
   x = 19,280,048,443.55/156,978.52
6. Step 6: Final answer
   x = 122,819.66