Finding the Third Proportional to 30.09 and 62.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30.09 : 62.72 = 62.72 : x
2. Step 2: Convert to fraction form
   30.09/62.72 = 62.72/x
3. Step 3: Cross multiply
   30.09x = 62.72 × 62.72
4. Step 4: Simplify right side
   30.09x = 3,933.64
5. Step 5: Solve for x
   x = 3,933.64/30.09
6. Step 6: Final answer
   x = 130.71