Finding the Fourth Proportional to 868.89, 1,304.07 and 814.16

Step by Step Solution

1. Step 1: Write the proportion equation
   868.89 : 1,304.07 = 814.16 : x
2. Step 2: Convert to fraction form
   868.89/1,304.07 = 814.16/x
3. Step 3: Cross multiply
   868.89x = 1,304.07 × 814.16
4. Step 4: Simplify right side
   868.89x = 1,061,711.04
5. Step 5: Solve for x
   x = 1,061,711.04/868.89
6. Step 6: Final answer
   x = 1,221.92