Finding the Third Proportional to 40.78 and 63.28

Step by Step Solution

1. Step 1: Write the proportion equation
   40.78 : 63.28 = 63.28 : x
2. Step 2: Convert to fraction form
   40.78/63.28 = 63.28/x
3. Step 3: Cross multiply
   40.78x = 63.28 × 63.28
4. Step 4: Simplify right side
   40.78x = 4,004.52
5. Step 5: Solve for x
   x = 4,004.52/40.78
6. Step 6: Final answer
   x = 98.20