text: RadioShack Profits as Wireless Sales Jump  NEW YORK (Reuters) - RadioShack Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=RSH.N target=/stocks/quickinfo/fullquote"&gt;RSH.N&lt;/A&gt; on Tuesday  posted a 22 percent rise in its third-quarter profit due to  strong wireless sales and cost control, and reaffirmed its goal  to grow 2005 earnings by as much 21 percent.