Finding the Fourth Proportional to 8,456.43, 12,677.76 and 5,674.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.43 : 12,677.76 = 5,674.62 : x
2. Step 2: Convert to fraction form
   8,456.43/12,677.76 = 5,674.62/x
3. Step 3: Cross multiply
   8,456.43x = 12,677.76 × 5,674.62
4. Step 4: Simplify right side
   8,456.43x = 71,941,470.45
5. Step 5: Solve for x
   x = 71,941,470.45/8,456.43
6. Step 6: Final answer
   x = 8,507.31