Finding the Fourth Proportional to 6,423.52, 8,867.76 and 3,940.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,423.52 : 8,867.76 = 3,940.96 : x
2. Step 2: Convert to fraction form
   6,423.52/8,867.76 = 3,940.96/x
3. Step 3: Cross multiply
   6,423.52x = 8,867.76 × 3,940.96
4. Step 4: Simplify right side
   6,423.52x = 34,947,487.45
5. Step 5: Solve for x
   x = 34,947,487.45/6,423.52
6. Step 6: Final answer
   x = 5,440.55