Finding the Fourth Proportional to 12,268.86, 18,400.71 and 3,949.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,268.86 : 18,400.71 = 3,949.62 : x
2. Step 2: Convert to fraction form
   12,268.86/18,400.71 = 3,949.62/x
3. Step 3: Cross multiply
   12,268.86x = 18,400.71 × 3,949.62
4. Step 4: Simplify right side
   12,268.86x = 72,675,812.23
5. Step 5: Solve for x
   x = 72,675,812.23/12,268.86
6. Step 6: Final answer
   x = 5,923.60