Finding the Third Proportional to 481.69 and 721.88

Step by Step Solution

1. Step 1: Write the proportion equation
   481.69 : 721.88 = 721.88 : x
2. Step 2: Convert to fraction form
   481.69/721.88 = 721.88/x
3. Step 3: Cross multiply
   481.69x = 721.88 × 721.88
4. Step 4: Simplify right side
   481.69x = 521,103.52
5. Step 5: Solve for x
   x = 521,103.52/481.69
6. Step 6: Final answer
   x = 1,081.83