Finding the Fourth Proportional to 1,531.16, 2,112.96 and 868.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.16 : 2,112.96 = 868.04 : x
2. Step 2: Convert to fraction form
   1,531.16/2,112.96 = 868.04/x
3. Step 3: Cross multiply
   1,531.16x = 2,112.96 × 868.04
4. Step 4: Simplify right side
   1,531.16x = 1,834,141.25
5. Step 5: Solve for x
   x = 1,834,141.25/1,531.16
6. Step 6: Final answer
   x = 1,197.87