Finding the Fourth Proportional to 12,270.27, 18,403.57 and 3,949.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,270.27 : 18,403.57 = 3,949.19 : x
2. Step 2: Convert to fraction form
   12,270.27/18,403.57 = 3,949.19/x
3. Step 3: Cross multiply
   12,270.27x = 18,403.57 × 3,949.19
4. Step 4: Simplify right side
   12,270.27x = 72,679,194.61
5. Step 5: Solve for x
   x = 72,679,194.61/12,270.27
6. Step 6: Final answer
   x = 5,923.19