Finding the Fourth Proportional to 1,531.37, 2,113.32 and 868.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.37 : 2,113.32 = 868.20 : x
2. Step 2: Convert to fraction form
   1,531.37/2,113.32 = 868.20/x
3. Step 3: Cross multiply
   1,531.37x = 2,113.32 × 868.20
4. Step 4: Simplify right side
   1,531.37x = 1,834,784.42
5. Step 5: Solve for x
   x = 1,834,784.42/1,531.37
6. Step 6: Final answer
   x = 1,198.14