Finding the Fourth Proportional to 12,331.38, 18,499.53 and 3,566.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,331.38 : 18,499.53 = 3,566.40 : x
2. Step 2: Convert to fraction form
   12,331.38/18,499.53 = 3,566.40/x
3. Step 3: Cross multiply
   12,331.38x = 18,499.53 × 3,566.40
4. Step 4: Simplify right side
   12,331.38x = 65,976,723.79
5. Step 5: Solve for x
   x = 65,976,723.79/12,331.38
6. Step 6: Final answer
   x = 5,350.31