Finding the Fourth Proportional to 89,470.26, 123,480.92 and 57,731.42

Step by Step Solution

1. Step 1: Write the proportion equation
   89,470.26 : 123,480.92 = 57,731.42 : x
2. Step 2: Convert to fraction form
   89,470.26/123,480.92 = 57,731.42/x
3. Step 3: Cross multiply
   89,470.26x = 123,480.92 × 57,731.42
4. Step 4: Simplify right side
   89,470.26x = 7,128,728,854.51
5. Step 5: Solve for x
   x = 7,128,728,854.51/89,470.26
6. Step 6: Final answer
   x = 79,677.08