Finding the Fourth Proportional to 9,632.28, 13,291.88 and 5,439.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,632.28 : 13,291.88 = 5,439.72 : x
2. Step 2: Convert to fraction form
   9,632.28/13,291.88 = 5,439.72/x
3. Step 3: Cross multiply
   9,632.28x = 13,291.88 × 5,439.72
4. Step 4: Simplify right side
   9,632.28x = 72,304,078.28
5. Step 5: Solve for x
   x = 72,304,078.28/9,632.28
6. Step 6: Final answer
   x = 7,506.43