How to track dell laptop which is stolen

Fill out a police report with the serial number. That is going to be about all you can do. Unless you paid for a service(like lojak), and installed their software, there really is no way to trace it.

your only 2 chances of getting it back would be to buy it back from whoever stole it - perhaps they posts it for sale on ebay or craigslist or some other method... or the police recover it somehow and call you to return it because you've reported its theft from your property