Finding the Fourth Proportional to 12,331.18, 18,499.54 and 3,566.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,331.18 : 18,499.54 = 3,566.78 : x
2. Step 2: Convert to fraction form
   12,331.18/18,499.54 = 3,566.78/x
3. Step 3: Cross multiply
   12,331.18x = 18,499.54 × 3,566.78
4. Step 4: Simplify right side
   12,331.18x = 65,983,687.87
5. Step 5: Solve for x
   x = 65,983,687.87/12,331.18
6. Step 6: Final answer
   x = 5,350.96