Finding the Third Proportional to 212,711.25 and 333,728

Step by Step Solution

1. Step 1: Write the proportion equation
   212,711.25 : 333,728 = 333,728 : x
2. Step 2: Convert to fraction form
   212,711.25/333,728 = 333,728/x
3. Step 3: Cross multiply
   212,711.25x = 333,728 × 333,728
4. Step 4: Simplify right side
   212,711.25x = 111,374,377,984
5. Step 5: Solve for x
   x = 111,374,377,984/212,711.25
6. Step 6: Final answer
   x = 523,594.21