Finding the Third Proportional to 11.81 and 11.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11.81 : 11.81 = 11.81 : x
2. Step 2: Convert to fraction form
   11.81/11.81 = 11.81/x
3. Step 3: Cross multiply
   11.81x = 11.81 × 11.81
4. Step 4: Simplify right side
   11.81x = 139.54
5. Step 5: Solve for x
   x = 139.54/11.81
6. Step 6: Final answer
   x = 11.81