Finding the Third Proportional to 363.38 and 721.69

Step by Step Solution

1. Step 1: Write the proportion equation
   363.38 : 721.69 = 721.69 : x
2. Step 2: Convert to fraction form
   363.38/721.69 = 721.69/x
3. Step 3: Cross multiply
   363.38x = 721.69 × 721.69
4. Step 4: Simplify right side
   363.38x = 520,832.85
5. Step 5: Solve for x
   x = 520,832.85/363.38
6. Step 6: Final answer
   x = 1,433.32