Finding the Fourth Proportional to 1,013.48, 1,517.59 and 868.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.48 : 1,517.59 = 868.16 : x
2. Step 2: Convert to fraction form
   1,013.48/1,517.59 = 868.16/x
3. Step 3: Cross multiply
   1,013.48x = 1,517.59 × 868.16
4. Step 4: Simplify right side
   1,013.48x = 1,317,512.56
5. Step 5: Solve for x
   x = 1,317,512.56/1,013.48
6. Step 6: Final answer
   x = 1,299.99