Finding the Third Proportional to 115.31 and 173.81

Step by Step Solution

1. Step 1: Write the proportion equation
   115.31 : 173.81 = 173.81 : x
2. Step 2: Convert to fraction form
   115.31/173.81 = 173.81/x
3. Step 3: Cross multiply
   115.31x = 173.81 × 173.81
4. Step 4: Simplify right side
   115.31x = 30,210.79
5. Step 5: Solve for x
   x = 30,210.79/115.31
6. Step 6: Final answer
   x = 261.99