Finding the Fourth Proportional to 2,599.83, 3,899.78 and 868.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.83 : 3,899.78 = 868.46 : x
2. Step 2: Convert to fraction form
   2,599.83/3,899.78 = 868.46/x
3. Step 3: Cross multiply
   2,599.83x = 3,899.78 × 868.46
4. Step 4: Simplify right side
   2,599.83x = 3,386,779.10
5. Step 5: Solve for x
   x = 3,386,779.10/2,599.83
6. Step 6: Final answer
   x = 1,302.69