Finding the Fourth Proportional to 1,531.82, 2,113.91 and 868.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.82 : 2,113.91 = 868.71 : x
2. Step 2: Convert to fraction form
   1,531.82/2,113.91 = 868.71/x
3. Step 3: Cross multiply
   1,531.82x = 2,113.91 × 868.71
4. Step 4: Simplify right side
   1,531.82x = 1,836,374.76
5. Step 5: Solve for x
   x = 1,836,374.76/1,531.82
6. Step 6: Final answer
   x = 1,198.82