What is the legitimacy of earning from the sale of machinery and equipment to another company that purchased through a financing company which added 10% to the total value of the offer?

This type of transaction is called Murabaha to the one who promises to purchase, and it is permissible if its conditions are met. These conditions are that the financing company buys the goods, takes possession of them, and receives them, then sells them to the second company (the one who promises to purchase) at a fixed increased price, with payment being either in cash or in installments.