Finding the Fourth Proportional to 9,152.32, 13,728.72 and 3,309.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.32 : 13,728.72 = 3,309.28 : x
2. Step 2: Convert to fraction form
   9,152.32/13,728.72 = 3,309.28/x
3. Step 3: Cross multiply
   9,152.32x = 13,728.72 × 3,309.28
4. Step 4: Simplify right side
   9,152.32x = 45,432,178.52
5. Step 5: Solve for x
   x = 45,432,178.52/9,152.32
6. Step 6: Final answer
   x = 4,964.01