You can't know that with certainty, MS doesn't reveal their 'Xbox division' earnings. I checked Yahoo finance and there are no such things, you can't invest into the 'Xbox division'. Whatever that's supposed to be. From a financial standpoint at Microsoft, there are no financial statements made specifically for the Xbox as a product. At least not publicly available.
At the end of the day, there are absolutely no doubts that Xbox has the worst profits margins in the industry out of the big three. Lowest install base, lowest software attach ratio and a shitty business model that low