Finding the Fourth Proportional to 137,480.52, 189,666.42 and 89,716.68

Step by Step Solution

1. Step 1: Write the proportion equation
   137,480.52 : 189,666.42 = 89,716.68 : x
2. Step 2: Convert to fraction form
   137,480.52/189,666.42 = 89,716.68/x
3. Step 3: Cross multiply
   137,480.52x = 189,666.42 × 89,716.68
4. Step 4: Simplify right side
   137,480.52x = 17,016,241,509.89
5. Step 5: Solve for x
   x = 17,016,241,509.89/137,480.52
6. Step 6: Final answer
   x = 123,772.02