Finding the Fourth Proportional to 1,144.02, 1,716.99 and 820.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.02 : 1,716.99 = 820.29 : x
2. Step 2: Convert to fraction form
   1,144.02/1,716.99 = 820.29/x
3. Step 3: Cross multiply
   1,144.02x = 1,716.99 × 820.29
4. Step 4: Simplify right side
   1,144.02x = 1,408,429.73
5. Step 5: Solve for x
   x = 1,408,429.73/1,144.02
6. Step 6: Final answer
   x = 1,231.12