Finding the Third Proportional to 263.25 and 410.06

Step by Step Solution

1. Step 1: Write the proportion equation
   263.25 : 410.06 = 410.06 : x
2. Step 2: Convert to fraction form
   263.25/410.06 = 410.06/x
3. Step 3: Cross multiply
   263.25x = 410.06 × 410.06
4. Step 4: Simplify right side
   263.25x = 168,151.25
5. Step 5: Solve for x
   x = 168,151.25/263.25
6. Step 6: Final answer
   x = 638.75