Finding the Fourth Proportional to 2,718.78, 4,076.18 and 868.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.78 : 4,076.18 = 868.83 : x
2. Step 2: Convert to fraction form
   2,718.78/4,076.18 = 868.83/x
3. Step 3: Cross multiply
   2,718.78x = 4,076.18 × 868.83
4. Step 4: Simplify right side
   2,718.78x = 3,541,500.12
5. Step 5: Solve for x
   x = 3,541,500.12/2,718.78
6. Step 6: Final answer
   x = 1,302.61