Finding the Fourth Proportional to 1,147.78, 1,584.46 and 868.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.78 : 1,584.46 = 868.06 : x
2. Step 2: Convert to fraction form
   1,147.78/1,584.46 = 868.06/x
3. Step 3: Cross multiply
   1,147.78x = 1,584.46 × 868.06
4. Step 4: Simplify right side
   1,147.78x = 1,375,406.35
5. Step 5: Solve for x
   x = 1,375,406.35/1,147.78
6. Step 6: Final answer
   x = 1,198.32