Finding the Fourth Proportional to 1,144.27, 1,715.75 and 450.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.27 : 1,715.75 = 450.12 : x
2. Step 2: Convert to fraction form
   1,144.27/1,715.75 = 450.12/x
3. Step 3: Cross multiply
   1,144.27x = 1,715.75 × 450.12
4. Step 4: Simplify right side
   1,144.27x = 772,293.39
5. Step 5: Solve for x
   x = 772,293.39/1,144.27
6. Step 6: Final answer
   x = 674.92