Finding the Third Proportional to 16.69 and 16.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16.69 : 16.69 = 16.69 : x
2. Step 2: Convert to fraction form
   16.69/16.69 = 16.69/x
3. Step 3: Cross multiply
   16.69x = 16.69 × 16.69
4. Step 4: Simplify right side
   16.69x = 278.47
5. Step 5: Solve for x
   x = 278.47/16.69
6. Step 6: Final answer
   x = 16.69