Finding the Third Proportional to 31,354 and 67,021

Step by Step Solution

1. Step 1: Write the proportion equation
   31,354 : 67,021 = 67,021 : x
2. Step 2: Convert to fraction form
   31,354/67,021 = 67,021/x
3. Step 3: Cross multiply
   31,354x = 67,021 × 67,021
4. Step 4: Simplify right side
   31,354x = 4,491,814,441
5. Step 5: Solve for x
   x = 4,491,814,441/31,354
6. Step 6: Final answer
   x = 143,261.29