Finding the Fourth Proportional to 156,641, 216,177.54 and 89,585.96

Step by Step Solution

1. Step 1: Write the proportion equation
   156,641 : 216,177.54 = 89,585.96 : x
2. Step 2: Convert to fraction form
   156,641/216,177.54 = 89,585.96/x
3. Step 3: Cross multiply
   156,641x = 216,177.54 × 89,585.96
4. Step 4: Simplify right side
   156,641x = 19,366,472,451.34
5. Step 5: Solve for x
   x = 19,366,472,451.34/156,641
6. Step 6: Final answer
   x = 123,636.04