The proposal is generally carried out before the engagement, because the proposal is the premise of marriage, one of the couple needs to make a lifelong request to the other side, to express his heart and determination to the lover. Engagement means that two people decide to get married after the two families discuss the marriage, it should be after the proposal and before the marriage.
Under normal circumstances, the proposal is before the engagement, because the proposal refers to the will of the other party, seeking the other party's consent to be with you, and the engagement is ready to determine the engagement, after the engagement is already the relationship between unmarried couples, further than the couple stage, so it is generally the first proposal and then engagement.
But there are also some couples before there is no proposal, directly start talking about marriage, this is also a very common situation, then in the face of this situation, it is possible to propose after engagement, and even some people decide to propose on the day of engagement.