Finding the Third Proportional to 65.25 and 144.75

Step by Step Solution

1. Step 1: Write the proportion equation
   65.25 : 144.75 = 144.75 : x
2. Step 2: Convert to fraction form
   65.25/144.75 = 144.75/x
3. Step 3: Cross multiply
   65.25x = 144.75 × 144.75
4. Step 4: Simplify right side
   65.25x = 20,952.56
5. Step 5: Solve for x
   x = 20,952.56/65.25
6. Step 6: Final answer
   x = 321.11