Finding the Fourth Proportional to 165,139.38, 227,892.15 and 89,687.34

Step by Step Solution

1. Step 1: Write the proportion equation
   165,139.38 : 227,892.15 = 89,687.34 : x
2. Step 2: Convert to fraction form
   165,139.38/227,892.15 = 89,687.34/x
3. Step 3: Cross multiply
   165,139.38x = 227,892.15 × 89,687.34
4. Step 4: Simplify right side
   165,139.38x = 20,439,040,740.38
5. Step 5: Solve for x
   x = 20,439,040,740.38/165,139.38
6. Step 6: Final answer
   x = 123,768.42