Finding the Third Proportional to 15.31 and 32.39

Step by Step Solution

1. Step 1: Write the proportion equation
   15.31 : 32.39 = 32.39 : x
2. Step 2: Convert to fraction form
   15.31/32.39 = 32.39/x
3. Step 3: Cross multiply
   15.31x = 32.39 × 32.39
4. Step 4: Simplify right side
   15.31x = 1,049.25
5. Step 5: Solve for x
   x = 1,049.25/15.31
6. Step 6: Final answer
   x = 68.55