Being a 24 year old, the tooth which you told to have fallen out would have been a permanent tooth. I am sorry to say a that another permanent tooth will not grow into the space in this age. But there are various treatment options available to replace the lost tooth, starting from removables, resin bonded filling tooth, bridges, implant are to name of the options. Kindly consult your nearby dentist
discuss the treatment options and have the best treatment done for you.