Finding the Third Proportional to 171.09 and 375.31

Step by Step Solution

1. Step 1: Write the proportion equation
   171.09 : 375.31 = 375.31 : x
2. Step 2: Convert to fraction form
   171.09/375.31 = 375.31/x
3. Step 3: Cross multiply
   171.09x = 375.31 × 375.31
4. Step 4: Simplify right side
   171.09x = 140,859.47
5. Step 5: Solve for x
   x = 140,859.47/171.09
6. Step 6: Final answer
   x = 823.29