Finding the Fourth Proportional to 89,892.35, 123,999.07 and 57,615.47

Step by Step Solution

1. Step 1: Write the proportion equation
   89,892.35 : 123,999.07 = 57,615.47 : x
2. Step 2: Convert to fraction form
   89,892.35/123,999.07 = 57,615.47/x
3. Step 3: Cross multiply
   89,892.35x = 123,999.07 × 57,615.47
4. Step 4: Simplify right side
   89,892.35x = 7,144,264,863.57
5. Step 5: Solve for x
   x = 7,144,264,863.57/89,892.35
6. Step 6: Final answer
   x = 79,475.78