Finding the Fourth Proportional to 1,008.50, 1,392.14 and 868.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.50 : 1,392.14 = 868.05 : x
2. Step 2: Convert to fraction form
   1,008.50/1,392.14 = 868.05/x
3. Step 3: Cross multiply
   1,008.50x = 1,392.14 × 868.05
4. Step 4: Simplify right side
   1,008.50x = 1,208,442.79
5. Step 5: Solve for x
   x = 1,208,442.79/1,008.50
6. Step 6: Final answer
   x = 1,198.26