Finding the Fourth Proportional to 8,513.59, 12,771.78 and 2,668.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,513.59 : 12,771.78 = 2,668.81 : x
2. Step 2: Convert to fraction form
   8,513.59/12,771.78 = 2,668.81/x
3. Step 3: Cross multiply
   8,513.59x = 12,771.78 × 2,668.81
4. Step 4: Simplify right side
   8,513.59x = 34,085,454.18
5. Step 5: Solve for x
   x = 34,085,454.18/8,513.59
6. Step 6: Final answer
   x = 4,003.65