Finding the Third Proportional to 80.89 and 173.18

Step by Step Solution

1. Step 1: Write the proportion equation
   80.89 : 173.18 = 173.18 : x
2. Step 2: Convert to fraction form
   80.89/173.18 = 173.18/x
3. Step 3: Cross multiply
   80.89x = 173.18 × 173.18
4. Step 4: Simplify right side
   80.89x = 29,991.20
5. Step 5: Solve for x
   x = 29,991.20/80.89
6. Step 6: Final answer
   x = 370.74