Finding the Fourth Proportional to 3,949.28, 5,449.72 and 2,270.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,949.28 : 5,449.72 = 2,270.32 : x
2. Step 2: Convert to fraction form
   3,949.28/5,449.72 = 2,270.32/x
3. Step 3: Cross multiply
   3,949.28x = 5,449.72 × 2,270.32
4. Step 4: Simplify right side
   3,949.28x = 12,372,608.31
5. Step 5: Solve for x
   x = 12,372,608.31/3,949.28
6. Step 6: Final answer
   x = 3,132.88