Put value to array

Hi guys, I'm stuck on this:

Is there any possible to get the value from here:

Code:

$result = mysql_query("SELECT estimated_sum FROM burndown_snap WHERE project_id ='$sum1' AND name='$sum2'");
while($row = mysql_fetch_array($result))
{
 $variabele = $row['estimated_sum'] . ",";
    echo $variabele;     
}

And put the values here:

Code:

$actualArray = array(? , ? , ?);

It's not so simple as I thought. Cannot just put there $variabele it's dosent work.
Any suggestions?