Finding the Third Proportional to 15.50 and 17.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15.50 : 17.69 = 17.69 : x
2. Step 2: Convert to fraction form
   15.50/17.69 = 17.69/x
3. Step 3: Cross multiply
   15.50x = 17.69 × 17.69
4. Step 4: Simplify right side
   15.50x = 312.85
5. Step 5: Solve for x
   x = 312.85/15.50
6. Step 6: Final answer
   x = 20.18