Finding the Third Proportional to 395.72 and 630.28

Step by Step Solution

1. Step 1: Write the proportion equation
   395.72 : 630.28 = 630.28 : x
2. Step 2: Convert to fraction form
   395.72/630.28 = 630.28/x
3. Step 3: Cross multiply
   395.72x = 630.28 × 630.28
4. Step 4: Simplify right side
   395.72x = 397,254.45
5. Step 5: Solve for x
   x = 397,254.45/395.72
6. Step 6: Final answer
   x = 1,003.88