Finding the Third Proportional to 287.72 and 452.25

Step by Step Solution

1. Step 1: Write the proportion equation
   287.72 : 452.25 = 452.25 : x
2. Step 2: Convert to fraction form
   287.72/452.25 = 452.25/x
3. Step 3: Cross multiply
   287.72x = 452.25 × 452.25
4. Step 4: Simplify right side
   287.72x = 204,530.06
5. Step 5: Solve for x
   x = 204,530.06/287.72
6. Step 6: Final answer
   x = 710.87