Finding the Fourth Proportional to 89,493.44, 123,490.72 and 71,581.92

Step by Step Solution

1. Step 1: Write the proportion equation
   89,493.44 : 123,490.72 = 71,581.92 : x
2. Step 2: Convert to fraction form
   89,493.44/123,490.72 = 71,581.92/x
3. Step 3: Cross multiply
   89,493.44x = 123,490.72 × 71,581.92
4. Step 4: Simplify right side
   89,493.44x = 8,839,702,839.78
5. Step 5: Solve for x
   x = 8,839,702,839.78/89,493.44
6. Step 6: Final answer
   x = 98,774.87