I think you mean to say that non-Africans will never be able to solve this problem.
I think the best outcome (which will never, ever happen by the way) is to let the continent of Africa be solely for the Africans, with all non-Africans banned or barred from going there. No trade, no exchanges, no travel, nothing.
Africa will then revert to what it used to be, a brutish, barbaric place with natural population controls. Africa cannot be fixed, so leave it be.
However, greed being what it is, and with the resources Africa has, this reversion back to its historic situation will not happen and non-Africans won't be able to keep away. What has been done cannot be undone.
The real issue is not the birthrate of Africans but the drastic decline in the Death Rate through the adoption or usage of Western medicine.