Finding the Third Proportional to 81.56 and 118.41

Step by Step Solution

1. Step 1: Write the proportion equation
   81.56 : 118.41 = 118.41 : x
2. Step 2: Convert to fraction form
   81.56/118.41 = 118.41/x
3. Step 3: Cross multiply
   81.56x = 118.41 × 118.41
4. Step 4: Simplify right side
   81.56x = 14,020.04
5. Step 5: Solve for x
   x = 14,020.04/81.56
6. Step 6: Final answer
   x = 171.89