Finding the Third Proportional to 72.72 and 109.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72.72 : 109.44 = 109.44 : x
2. Step 2: Convert to fraction form
   72.72/109.44 = 109.44/x
3. Step 3: Cross multiply
   72.72x = 109.44 × 109.44
4. Step 4: Simplify right side
   72.72x = 11,976.57
5. Step 5: Solve for x
   x = 11,976.57/72.72
6. Step 6: Final answer
   x = 164.70