Finding the Third Proportional to 320.91 and 484.59

Step by Step Solution

1. Step 1: Write the proportion equation
   320.91 : 484.59 = 484.59 : x
2. Step 2: Convert to fraction form
   320.91/484.59 = 484.59/x
3. Step 3: Cross multiply
   320.91x = 484.59 × 484.59
4. Step 4: Simplify right side
   320.91x = 234,831.10
5. Step 5: Solve for x
   x = 234,831.10/320.91
6. Step 6: Final answer
   x = 731.77