Finding the Fourth Proportional to 12,268.78, 18,406.07 and 3,949.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,268.78 : 18,406.07 = 3,949.27 : x
2. Step 2: Convert to fraction form
   12,268.78/18,406.07 = 3,949.27/x
3. Step 3: Cross multiply
   12,268.78x = 18,406.07 × 3,949.27
4. Step 4: Simplify right side
   12,268.78x = 72,690,540.07
5. Step 5: Solve for x
   x = 72,690,540.07/12,268.78
6. Step 6: Final answer
   x = 5,924.84