Finding the Fourth Proportional to 3,949.15, 5,433.06 and 3,839.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,949.15 : 5,433.06 = 3,839.80 : x
2. Step 2: Convert to fraction form
   3,949.15/5,433.06 = 3,839.80/x
3. Step 3: Cross multiply
   3,949.15x = 5,433.06 × 3,839.80
4. Step 4: Simplify right side
   3,949.15x = 20,861,863.79
5. Step 5: Solve for x
   x = 20,861,863.79/3,949.15
6. Step 6: Final answer
   x = 5,282.62