Finding the Third Proportional to 443.30 and 708.20

Step by Step Solution

1. Step 1: Write the proportion equation
   443.30 : 708.20 = 708.20 : x
2. Step 2: Convert to fraction form
   443.30/708.20 = 708.20/x
3. Step 3: Cross multiply
   443.30x = 708.20 × 708.20
4. Step 4: Simplify right side
   443.30x = 501,545.49
5. Step 5: Solve for x
   x = 501,545.49/443.30
6. Step 6: Final answer
   x = 1,131.39