Finding the Third Proportional to 71.32 and 109.15

Step by Step Solution

1. Step 1: Write the proportion equation
   71.32 : 109.15 = 109.15 : x
2. Step 2: Convert to fraction form
   71.32/109.15 = 109.15/x
3. Step 3: Cross multiply
   71.32x = 109.15 × 109.15
4. Step 4: Simplify right side
   71.32x = 11,913.06
5. Step 5: Solve for x
   x = 11,913.06/71.32
6. Step 6: Final answer
   x = 167.03