Finding the Third Proportional to 42.38 and 65.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42.38 : 65.06 = 65.06 : x
2. Step 2: Convert to fraction form
   42.38/65.06 = 65.06/x
3. Step 3: Cross multiply
   42.38x = 65.06 × 65.06
4. Step 4: Simplify right side
   42.38x = 4,233.13
5. Step 5: Solve for x
   x = 4,233.13/42.38
6. Step 6: Final answer
   x = 99.90