Issue With Vector3 and Transform

So I am currently running into this error

Cannot implicitly convert type 'UnityEngine.Vector3" to 'Unity.Engine.Transfomr'

I am not to sure on how to fix this issue because I am very confused on whats causing this to happen, here's the code where the issue is occurring.

 target = pickedNumber.transform.position;
 ball.transform.position = Vector3.MoveTowards(transform.position, target.position, step);

Now just in case that's not enough to help me solve the issue here's the for loop that it's in...

 float waitTime = 8;
     float step = speed * Time.deltaTime * 2;
     
     yield return new WaitForSeconds (waitTime);
     
     for (int i = 0; i <= 19; i++) {
         //Finding Game Objects
         numbers = GameObject.FindGameObjectsWithTag ("num");
         ball = GameObject.FindGameObjectWithTag ("ball");
         
         //Picking the random cube
         index = Random.Range (0, numbers.Length);
         pickedNumber = numbers [index];
         
         //Moving ball to cube
         target = pickedNumber.transform.position;
         ball.transform.position = Vector3.MoveTowards(transform.position, target.position, step);
         
 
         
         //Pause here
         yield return new WaitForSeconds (waitTime);
         
         //Ball Returns to position
         ball.transform.position = new Vector3 (0, 0, 0);
     }