Finding the Fourth Proportional to 1,531.30, 2,113.30 and 868.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.30 : 2,113.30 = 868.19 : x
2. Step 2: Convert to fraction form
   1,531.30/2,113.30 = 868.19/x
3. Step 3: Cross multiply
   1,531.30x = 2,113.30 × 868.19
4. Step 4: Simplify right side
   1,531.30x = 1,834,755.50
5. Step 5: Solve for x
   x = 1,834,755.50/1,531.30
6. Step 6: Final answer
   x = 1,198.17