Finding the Fourth Proportional to 2,599.42, 3,899.17 and 868.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.42 : 3,899.17 = 868.05 : x
2. Step 2: Convert to fraction form
   2,599.42/3,899.17 = 868.05/x
3. Step 3: Cross multiply
   2,599.42x = 3,899.17 × 868.05
4. Step 4: Simplify right side
   2,599.42x = 3,384,662.60
5. Step 5: Solve for x
   x = 3,384,662.60/2,599.42
6. Step 6: Final answer
   x = 1,302.08