Finding the Fourth Proportional to 1,144.89, 1,580.33 and 814.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.89 : 1,580.33 = 814.28 : x
2. Step 2: Convert to fraction form
   1,144.89/1,580.33 = 814.28/x
3. Step 3: Cross multiply
   1,144.89x = 1,580.33 × 814.28
4. Step 4: Simplify right side
   1,144.89x = 1,286,829.20
5. Step 5: Solve for x
   x = 1,286,829.20/1,144.89
6. Step 6: Final answer
   x = 1,123.97