Finding the Fourth Proportional to 89,234.28, 123,170.88 and 57,403.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,234.28 : 123,170.88 = 57,403.20 : x
2. Step 2: Convert to fraction form
   89,234.28/123,170.88 = 57,403.20/x
3. Step 3: Cross multiply
   89,234.28x = 123,170.88 × 57,403.20
4. Step 4: Simplify right side
   89,234.28x = 7,070,402,658.82
5. Step 5: Solve for x
   x = 7,070,402,658.82/89,234.28
6. Step 6: Final answer
   x = 79,234.15