Finding the Third Proportional to 82.05 and 134.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.05 : 134.31 = 134.31 : x
2. Step 2: Convert to fraction form
   82.05/134.31 = 134.31/x
3. Step 3: Cross multiply
   82.05x = 134.31 × 134.31
4. Step 4: Simplify right side
   82.05x = 18,039.85
5. Step 5: Solve for x
   x = 18,039.85/82.05
6. Step 6: Final answer
   x = 219.87