Finding the Third Proportional to 320.72 and 479.83

Step by Step Solution

1. Step 1: Write the proportion equation
   320.72 : 479.83 = 479.83 : x
2. Step 2: Convert to fraction form
   320.72/479.83 = 479.83/x
3. Step 3: Cross multiply
   320.72x = 479.83 × 479.83
4. Step 4: Simplify right side
   320.72x = 230,236.90
5. Step 5: Solve for x
   x = 230,236.90/320.72
6. Step 6: Final answer
   x = 717.88