Finding the Third Proportional to 64.50 and 103.31

Step by Step Solution

1. Step 1: Write the proportion equation
   64.50 : 103.31 = 103.31 : x
2. Step 2: Convert to fraction form
   64.50/103.31 = 103.31/x
3. Step 3: Cross multiply
   64.50x = 103.31 × 103.31
4. Step 4: Simplify right side
   64.50x = 10,673.47
5. Step 5: Solve for x
   x = 10,673.47/64.50
6. Step 6: Final answer
   x = 165.48