Finding the Fourth Proportional to 2,599.56, 3,899.55 and 868.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.56 : 3,899.55 = 868.19 : x
2. Step 2: Convert to fraction form
   2,599.56/3,899.55 = 868.19/x
3. Step 3: Cross multiply
   2,599.56x = 3,899.55 × 868.19
4. Step 4: Simplify right side
   2,599.56x = 3,385,550.31
5. Step 5: Solve for x
   x = 3,385,550.31/2,599.56
6. Step 6: Final answer
   x = 1,302.36