gravatar customization

Hi there

What should I do to align my gravatar on the right side of comments?

The code from comments.php is:

<?php if ( $comments ) : ?>
<ol id="commentlist">

<?php foreach ($comments as $comment) : ?>

<li id="comment-<?php comment_ID() ?>"><cite><?php comment_type(__('Komentarz'), __('Trackback'), __('Pingback')); ?> <?php _e('by'); ?> <?php comment_author_link() ?> — <?php comment_date() ?> @ <a href="#comment-<?php comment_ID() ?>"><?php comment_time() ?></a></cite> <?php edit_comment_link(__("Edit This"), ' |'); ?>
    <?php comment_text() ?>
<?php echo get_avatar( $comment, '48' ) ; ?>

    </li>

<?php endforeach; ?>