Finding the Fourth Proportional to 1,567.17, 2,162.71 and 868.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,567.17 : 2,162.71 = 868.55 : x
2. Step 2: Convert to fraction form
   1,567.17/2,162.71 = 868.55/x
3. Step 3: Cross multiply
   1,567.17x = 2,162.71 × 868.55
4. Step 4: Simplify right side
   1,567.17x = 1,878,408.79
5. Step 5: Solve for x
   x = 1,878,408.79/1,567.17
6. Step 6: Final answer
   x = 1,198.60