@Williams_girl
The New Living Translation is a good version for checking long lists - Numbers 2
https://biblehub.com/nlt/numbers/2.htm
The math indicates the numbers tend the way he says, and then it is a matter of combining that with the shape of the setup of the Tabernacle and exactly how the various encampment were placed.
It is at least plausible.
I have never seen it before, the other version I saw placed the tribes side by side.
Given that the longest side and the opening of the Tabernacle faced the sunrise, like the Temple did, it also shows a fascinating "shadow of a cross" within the Tabernacle area too.
So there is at least one cross, if not two, in the entire setup.
And what struck me once I saw Zola Levitt Ministries' 1980s program about the Tabernacle together with a Bible scholar, was that when seen as a model, it indeed looks like a Pesach/Easter/Passion play in itself, with the various rooms, items and elements reminiscent of that weekend.