Finding the Third Proportional to 30,728 and 67,336

Step by Step Solution

1. Step 1: Write the proportion equation
   30,728 : 67,336 = 67,336 : x
2. Step 2: Convert to fraction form
   30,728/67,336 = 67,336/x
3. Step 3: Cross multiply
   30,728x = 67,336 × 67,336
4. Step 4: Simplify right side
   30,728x = 4,534,136,896
5. Step 5: Solve for x
   x = 4,534,136,896/30,728
6. Step 6: Final answer
   x = 147,557.18