Finding the Fourth Proportional to 89,892.11, 123,998.73 and 57,615.23

Step by Step Solution

1. Step 1: Write the proportion equation
   89,892.11 : 123,998.73 = 57,615.23 : x
2. Step 2: Convert to fraction form
   89,892.11/123,998.73 = 57,615.23/x
3. Step 3: Cross multiply
   89,892.11x = 123,998.73 × 57,615.23
4. Step 4: Simplify right side
   89,892.11x = 7,144,215,348.66
5. Step 5: Solve for x
   x = 7,144,215,348.66/89,892.11
6. Step 6: Final answer
   x = 79,475.44