Finding the Fourth Proportional to 1,531.42, 2,113.18 and 868.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.42 : 2,113.18 = 868.26 : x
2. Step 2: Convert to fraction form
   1,531.42/2,113.18 = 868.26/x
3. Step 3: Cross multiply
   1,531.42x = 2,113.18 × 868.26
4. Step 4: Simplify right side
   1,531.42x = 1,834,789.67
5. Step 5: Solve for x
   x = 1,834,789.67/1,531.42
6. Step 6: Final answer
   x = 1,198.10