Finding the Fourth Proportional to 2,255.92, 3,383.42 and 868.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.92 : 3,383.42 = 868.78 : x
2. Step 2: Convert to fraction form
   2,255.92/3,383.42 = 868.78/x
3. Step 3: Cross multiply
   2,255.92x = 3,383.42 × 868.78
4. Step 4: Simplify right side
   2,255.92x = 2,939,443.28
5. Step 5: Solve for x
   x = 2,939,443.28/2,255.92
6. Step 6: Final answer
   x = 1,302.99