Finding the Third Proportional to 2.64 and 3.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2.64 : 3.69 = 3.69 : x
2. Step 2: Convert to fraction form
   2.64/3.69 = 3.69/x
3. Step 3: Cross multiply
   2.64x = 3.69 × 3.69
4. Step 4: Simplify right side
   2.64x = 13.59
5. Step 5: Solve for x
   x = 13.59/2.64
6. Step 6: Final answer
   x = 5.15