Finding the Fourth Proportional to 89,892.85, 123,999.76 and 57,615.97

Step by Step Solution

1. Step 1: Write the proportion equation
   89,892.85 : 123,999.76 = 57,615.97 : x
2. Step 2: Convert to fraction form
   89,892.85/123,999.76 = 57,615.97/x
3. Step 3: Cross multiply
   89,892.85x = 123,999.76 × 57,615.97
4. Step 4: Simplify right side
   89,892.85x = 7,144,366,452.17
5. Step 5: Solve for x
   x = 7,144,366,452.17/89,892.85
6. Step 6: Final answer
   x = 79,476.47