Finding the Third Proportional to 42.63 and 64.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42.63 : 64.38 = 64.38 : x
2. Step 2: Convert to fraction form
   42.63/64.38 = 64.38/x
3. Step 3: Cross multiply
   42.63x = 64.38 × 64.38
4. Step 4: Simplify right side
   42.63x = 4,144.14
5. Step 5: Solve for x
   x = 4,144.14/42.63
6. Step 6: Final answer
   x = 97.22