Finding the Fourth Proportional to 156,655.50, 216,184.59 and 89,587.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,655.50 : 216,184.59 = 89,587.50 : x
2. Step 2: Convert to fraction form
   156,655.50/216,184.59 = 89,587.50/x
3. Step 3: Cross multiply
   156,655.50x = 216,184.59 × 89,587.50
4. Step 4: Simplify right side
   156,655.50x = 19,367,436,956.63
5. Step 5: Solve for x
   x = 19,367,436,956.63/156,655.50
6. Step 6: Final answer
   x = 123,630.75