Finding the Fourth Proportional to 8,456.67, 12,684.69 and 2,613.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.67 : 12,684.69 = 2,613.27 : x
2. Step 2: Convert to fraction form
   8,456.67/12,684.69 = 2,613.27/x
3. Step 3: Cross multiply
   8,456.67x = 12,684.69 × 2,613.27
4. Step 4: Simplify right side
   8,456.67x = 33,148,519.84
5. Step 5: Solve for x
   x = 33,148,519.84/8,456.67
6. Step 6: Final answer
   x = 3,919.81