I'm sorry, but it seems that the coordinates of the "beduygce8igteferf6xre68few86ef" vertex are not provided in your question. In order to determine the coordinates of a vertex on a grid, you typically need more information, such as the positions of other vertices or the type of grid being used. Please provide additional details or clarify your question.
To determine the coordinates of the fourth vertex, we need more information about the shape and properties of the given three vertices. Please provide additional details or clarify your question so I can assist you better.
