Finding the Third Proportional to 65.72 and 144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   65.72 : 144.09 = 144.09 : x
2. Step 2: Convert to fraction form
   65.72/144.09 = 144.09/x
3. Step 3: Cross multiply
   65.72x = 144.09 × 144.09
4. Step 4: Simplify right side
   65.72x = 20,763.01
5. Step 5: Solve for x
   x = 20,763.01/65.72
6. Step 6: Final answer
   x = 315.94