Finding the Fourth Proportional to 1,147.91, 1,586.45 and 868.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.91 : 1,586.45 = 868.05 : x
2. Step 2: Convert to fraction form
   1,147.91/1,586.45 = 868.05/x
3. Step 3: Cross multiply
   1,147.91x = 1,586.45 × 868.05
4. Step 4: Simplify right side
   1,147.91x = 1,377,117.92
5. Step 5: Solve for x
   x = 1,377,117.92/1,147.91
6. Step 6: Final answer
   x = 1,199.67