Finding the Third Proportional to 31.17 and 39.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31.17 : 39.27 = 39.27 : x
2. Step 2: Convert to fraction form
   31.17/39.27 = 39.27/x
3. Step 3: Cross multiply
   31.17x = 39.27 × 39.27
4. Step 4: Simplify right side
   31.17x = 1,542.10
5. Step 5: Solve for x
   x = 1,542.10/31.17
6. Step 6: Final answer
   x = 49.47