Finding the Fourth Proportional to 156,999, 216,658.62 and 89,935.32

Step by Step Solution

1. Step 1: Write the proportion equation
   156,999 : 216,658.62 = 89,935.32 : x
2. Step 2: Convert to fraction form
   156,999/216,658.62 = 89,935.32/x
3. Step 3: Cross multiply
   156,999x = 216,658.62 × 89,935.32
4. Step 4: Simplify right side
   156,999x = 19,485,262,320.46
5. Step 5: Solve for x
   x = 19,485,262,320.46/156,999
6. Step 6: Final answer
   x = 124,110.74