Finding the Fourth Proportional to 156,672.86, 216,185.73 and 89,591.90

Step by Step Solution

1. Step 1: Write the proportion equation
   156,672.86 : 216,185.73 = 89,591.90 : x
2. Step 2: Convert to fraction form
   156,672.86/216,185.73 = 89,591.90/x
3. Step 3: Cross multiply
   156,672.86x = 216,185.73 × 89,591.90
4. Step 4: Simplify right side
   156,672.86x = 19,368,490,303.59
5. Step 5: Solve for x
   x = 19,368,490,303.59/156,672.86
6. Step 6: Final answer
   x = 123,623.77