Finding the Third Proportional to 21,728 and 28,974

Step by Step Solution

1. Step 1: Write the proportion equation
   21,728 : 28,974 = 28,974 : x
2. Step 2: Convert to fraction form
   21,728/28,974 = 28,974/x
3. Step 3: Cross multiply
   21,728x = 28,974 × 28,974
4. Step 4: Simplify right side
   21,728x = 839,492,676
5. Step 5: Solve for x
   x = 839,492,676/21,728
6. Step 6: Final answer
   x = 38,636.44