Finding the Fourth Proportional to 2,600.00, 3,900.13 and 868.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.00 : 3,900.13 = 868.76 : x
2. Step 2: Convert to fraction form
   2,600.00/3,900.13 = 868.76/x
3. Step 3: Cross multiply
   2,600.00x = 3,900.13 × 868.76
4. Step 4: Simplify right side
   2,600.00x = 3,388,257.44
5. Step 5: Solve for x
   x = 3,388,257.44/2,600.00
6. Step 6: Final answer
   x = 1,303.18