Finding the Fourth Proportional to 8,456.38, 12,685.73 and 2,613.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.38 : 12,685.73 = 2,613.42 : x
2. Step 2: Convert to fraction form
   8,456.38/12,685.73 = 2,613.42/x
3. Step 3: Cross multiply
   8,456.38x = 12,685.73 × 2,613.42
4. Step 4: Simplify right side
   8,456.38x = 33,153,140.50
5. Step 5: Solve for x
   x = 33,153,140.50/8,456.38
6. Step 6: Final answer
   x = 3,920.49