Finding the Fourth Proportional to 2,600.06, 3,900.30 and 868.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.06 : 3,900.30 = 868.69 : x
2. Step 2: Convert to fraction form
   2,600.06/3,900.30 = 868.69/x
3. Step 3: Cross multiply
   2,600.06x = 3,900.30 × 868.69
4. Step 4: Simplify right side
   2,600.06x = 3,388,151.61
5. Step 5: Solve for x
   x = 3,388,151.61/2,600.06
6. Step 6: Final answer
   x = 1,303.11