Finding the Fourth Proportional to 1,531.49, 2,113.47 and 868.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.49 : 2,113.47 = 868.34 : x
2. Step 2: Convert to fraction form
   1,531.49/2,113.47 = 868.34/x
3. Step 3: Cross multiply
   1,531.49x = 2,113.47 × 868.34
4. Step 4: Simplify right side
   1,531.49x = 1,835,210.54
5. Step 5: Solve for x
   x = 1,835,210.54/1,531.49
6. Step 6: Final answer
   x = 1,198.32