Finding the Fourth Proportional to 8,456.81, 12,684.84 and 2,613.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.81 : 12,684.84 = 2,613.38 : x
2. Step 2: Convert to fraction form
   8,456.81/12,684.84 = 2,613.38/x
3. Step 3: Cross multiply
   8,456.81x = 12,684.84 × 2,613.38
4. Step 4: Simplify right side
   8,456.81x = 33,150,307.16
5. Step 5: Solve for x
   x = 33,150,307.16/8,456.81
6. Step 6: Final answer
   x = 3,919.95