Finding the Fourth Proportional to 89,192.88, 123,021.72 and 75,742.92

Step by Step Solution

1. Step 1: Write the proportion equation
   89,192.88 : 123,021.72 = 75,742.92 : x
2. Step 2: Convert to fraction form
   89,192.88/123,021.72 = 75,742.92/x
3. Step 3: Cross multiply
   89,192.88x = 123,021.72 × 75,742.92
4. Step 4: Simplify right side
   89,192.88x = 9,318,024,296.22
5. Step 5: Solve for x
   x = 9,318,024,296.22/89,192.88
6. Step 6: Final answer
   x = 104,470.49