Finding the Fourth Proportional to 2,506.88, 3,759.48 and 863.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.88 : 3,759.48 = 863.40 : x
2. Step 2: Convert to fraction form
   2,506.88/3,759.48 = 863.40/x
3. Step 3: Cross multiply
   2,506.88x = 3,759.48 × 863.40
4. Step 4: Simplify right side
   2,506.88x = 3,245,935.03
5. Step 5: Solve for x
   x = 3,245,935.03/2,506.88
6. Step 6: Final answer
   x = 1,294.81