Finding the Third Proportional to 40.82 and 90.12

Step by Step Solution

1. Step 1: Write the proportion equation
   40.82 : 90.12 = 90.12 : x
2. Step 2: Convert to fraction form
   40.82/90.12 = 90.12/x
3. Step 3: Cross multiply
   40.82x = 90.12 × 90.12
4. Step 4: Simplify right side
   40.82x = 8,122.16
5. Step 5: Solve for x
   x = 8,122.16/40.82
6. Step 6: Final answer
   x = 198.99