Finding the Third Proportional to 15.69 and 39.88

Step by Step Solution

1. Step 1: Write the proportion equation
   15.69 : 39.88 = 39.88 : x
2. Step 2: Convert to fraction form
   15.69/39.88 = 39.88/x
3. Step 3: Cross multiply
   15.69x = 39.88 × 39.88
4. Step 4: Simplify right side
   15.69x = 1,590.02
5. Step 5: Solve for x
   x = 1,590.02/15.69
6. Step 6: Final answer
   x = 101.36