Finding the Third Proportional to 142 and 171.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142 : 171.25 = 171.25 : x
2. Step 2: Convert to fraction form
   142/171.25 = 171.25/x
3. Step 3: Cross multiply
   142x = 171.25 × 171.25
4. Step 4: Simplify right side
   142x = 29,326.56
5. Step 5: Solve for x
   x = 29,326.56/142
6. Step 6: Final answer
   x = 206.53