Finding the Fourth Proportional to 1,086.49, 1,626.27 and 868.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.49 : 1,626.27 = 868.24 : x
2. Step 2: Convert to fraction form
   1,086.49/1,626.27 = 868.24/x
3. Step 3: Cross multiply
   1,086.49x = 1,626.27 × 868.24
4. Step 4: Simplify right side
   1,086.49x = 1,411,992.66
5. Step 5: Solve for x
   x = 1,411,992.66/1,086.49
6. Step 6: Final answer
   x = 1,299.59