Finding the Fourth Proportional to 1,144.16, 1,715.76 and 450.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.16 : 1,715.76 = 450.72 : x
2. Step 2: Convert to fraction form
   1,144.16/1,715.76 = 450.72/x
3. Step 3: Cross multiply
   1,144.16x = 1,715.76 × 450.72
4. Step 4: Simplify right side
   1,144.16x = 773,327.35
5. Step 5: Solve for x
   x = 773,327.35/1,144.16
6. Step 6: Final answer
   x = 675.89