Finding the Fourth Proportional to 1,531.46, 2,113.89 and 868.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.46 : 2,113.89 = 868.75 : x
2. Step 2: Convert to fraction form
   1,531.46/2,113.89 = 868.75/x
3. Step 3: Cross multiply
   1,531.46x = 2,113.89 × 868.75
4. Step 4: Simplify right side
   1,531.46x = 1,836,427.02
5. Step 5: Solve for x
   x = 1,836,427.02/1,531.46
6. Step 6: Final answer
   x = 1,199.14