Finding the Third Proportional to 40.17 and 64.69

Step by Step Solution

1. Step 1: Write the proportion equation
   40.17 : 64.69 = 64.69 : x
2. Step 2: Convert to fraction form
   40.17/64.69 = 64.69/x
3. Step 3: Cross multiply
   40.17x = 64.69 × 64.69
4. Step 4: Simplify right side
   40.17x = 4,184.47
5. Step 5: Solve for x
   x = 4,184.47/40.17
6. Step 6: Final answer
   x = 104.16