Finding the Fourth Proportional to 6,398.16, 9,576.72 and 3,429.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,398.16 : 9,576.72 = 3,429.20 : x
2. Step 2: Convert to fraction form
   6,398.16/9,576.72 = 3,429.20/x
3. Step 3: Cross multiply
   6,398.16x = 9,576.72 × 3,429.20
4. Step 4: Simplify right side
   6,398.16x = 32,840,440.34
5. Step 5: Solve for x
   x = 32,840,440.34/6,398.16
6. Step 6: Final answer
   x = 5,132.79