Finding the Fourth Proportional to 6,399.52, 8,828.92 and 3,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.52 : 8,828.92 = 3,880.72 : x
2. Step 2: Convert to fraction form
   6,399.52/8,828.92 = 3,880.72/x
3. Step 3: Cross multiply
   6,399.52x = 8,828.92 × 3,880.72
4. Step 4: Simplify right side
   6,399.52x = 34,262,566.42
5. Step 5: Solve for x
   x = 34,262,566.42/6,399.52
6. Step 6: Final answer
   x = 5,353.93