Finding the Third Proportional to 32.22 and 66.72

Step by Step Solution

1. Step 1: Write the proportion equation
   32.22 : 66.72 = 66.72 : x
2. Step 2: Convert to fraction form
   32.22/66.72 = 66.72/x
3. Step 3: Cross multiply
   32.22x = 66.72 × 66.72
4. Step 4: Simplify right side
   32.22x = 4,451.39
5. Step 5: Solve for x
   x = 4,451.39/32.22
6. Step 6: Final answer
   x = 138.16