They are one of the most successful families on the planet, with business ventures spanning fields from television to apps to exercise gear to socks and much, much more. However, the most financially successful of the Kardashian clan is the baby of the five sisters, Kylie Jenner.The reality star turned business owner is so successful owing to her brand Kylie Cosmetics which is reportedly responsible for her 10-figure net worth: she is the world’s youngest self-made billionaire.