Finding the Third Proportional to 28.38 and 60.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28.38 : 60.69 = 60.69 : x
2. Step 2: Convert to fraction form
   28.38/60.69 = 60.69/x
3. Step 3: Cross multiply
   28.38x = 60.69 × 60.69
4. Step 4: Simplify right side
   28.38x = 3,682.97
5. Step 5: Solve for x
   x = 3,682.97/28.38
6. Step 6: Final answer
   x = 129.80