Finding the Fourth Proportional to 1,531.69, 2,113.58 and 868.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.69 : 2,113.58 = 868.41 : x
2. Step 2: Convert to fraction form
   1,531.69/2,113.58 = 868.41/x
3. Step 3: Cross multiply
   1,531.69x = 2,113.58 × 868.41
4. Step 4: Simplify right side
   1,531.69x = 1,835,454.01
5. Step 5: Solve for x
   x = 1,835,454.01/1,531.69
6. Step 6: Final answer
   x = 1,198.32