Finding the Fourth Proportional to 89,892.61, 123,999.42 and 57,615.73

Step by Step Solution

1. Step 1: Write the proportion equation
   89,892.61 : 123,999.42 = 57,615.73 : x
2. Step 2: Convert to fraction form
   89,892.61/123,999.42 = 57,615.73/x
3. Step 3: Cross multiply
   89,892.61x = 123,999.42 × 57,615.73
4. Step 4: Simplify right side
   89,892.61x = 7,144,317,102.88
5. Step 5: Solve for x
   x = 7,144,317,102.88/89,892.61
6. Step 6: Final answer
   x = 79,476.13