Update transform point

I have this code in separate file to get platform position, whenever the platform tracker crosses the point.

 void Update()
     {
         if (transform.position.x < platformTrackerPoint.transform.position.x)
         {
             platformTransform = gameObject.transform.position;         
         }
     }

I am calling this code in the player script file in the update function. But the transform position is not updating in player script file.

 tempPosition = thePlatformTracker.platformTransform;
 gameObject.transform.position = tempPosition;

Your guidance is appreciated. Please let me know if anything is not clear.