Finding the Fourth Proportional to 6,296.72, 8,689.52 and 3,940.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,296.72 : 8,689.52 = 3,940.20 : x
2. Step 2: Convert to fraction form
   6,296.72/8,689.52 = 3,940.20/x
3. Step 3: Cross multiply
   6,296.72x = 8,689.52 × 3,940.20
4. Step 4: Simplify right side
   6,296.72x = 34,238,446.70
5. Step 5: Solve for x
   x = 34,238,446.70/6,296.72
6. Step 6: Final answer
   x = 5,437.51