Finding the Fourth Proportional to 1,531.71, 2,113.57 and 868.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.71 : 2,113.57 = 868.52 : x
2. Step 2: Convert to fraction form
   1,531.71/2,113.57 = 868.52/x
3. Step 3: Cross multiply
   1,531.71x = 2,113.57 × 868.52
4. Step 4: Simplify right side
   1,531.71x = 1,835,677.82
5. Step 5: Solve for x
   x = 1,835,677.82/1,531.71
6. Step 6: Final answer
   x = 1,198.45