Finding the Fourth Proportional to 137,499.84, 189,781.92 and 89,669.88

Step by Step Solution

1. Step 1: Write the proportion equation
   137,499.84 : 189,781.92 = 89,669.88 : x
2. Step 2: Convert to fraction form
   137,499.84/189,781.92 = 89,669.88/x
3. Step 3: Cross multiply
   137,499.84x = 189,781.92 × 89,669.88
4. Step 4: Simplify right side
   137,499.84x = 17,017,721,992.57
5. Step 5: Solve for x
   x = 17,017,721,992.57/137,499.84
6. Step 6: Final answer
   x = 123,765.39