On good arrangement would be something like
series (currently column A) -- X values (currently column B) -- Y values (currently column C) -- 1 -- 2 -- 3 -- ... series numbers across top.
1 -- 422950 -- 1673 -- =IF($A2=D$1,$C2,na()) -- copy of D2 -- copy of D2 -- ... note the mix of relative and absolute references to make copying easy.
2 -- 432950 -- 1772 -- copy of D2 -- copy of D2 -- copy of D2 --...
and so on.
Select column B:whatever and insert scatter chart. Assuming Excel gets the x values correctly assigned, you should only need to delete the first data series referring to column C.
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