Finding the Fourth Proportional to 1,144.72, 1,716.96 and 451.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.72 : 1,716.96 = 451.24 : x
2. Step 2: Convert to fraction form
   1,144.72/1,716.96 = 451.24/x
3. Step 3: Cross multiply
   1,144.72x = 1,716.96 × 451.24
4. Step 4: Simplify right side
   1,144.72x = 774,761.03
5. Step 5: Solve for x
   x = 774,761.03/1,144.72
6. Step 6: Final answer
   x = 676.81