Not without knowing how the reported value is connected to the distance from the sensor to the point of "change". If you can use the reported value to determine the distance, then you can imagine three circles with the sensors as center and the determined distances as radii. For example, if you sensors are at (x_a, y_a), (x_b,y_b)[/itex], and (x_c,,y_c) and the distances are determined to be R_a, R_b, and R_c, respectively, the the point to be determined must satisfy (x-x_a)^2+ (y-y_a)^2= R_a^2, (x-x_b)^2+ (y-y_b)^2= R_b^2, and (x-x_c)^2+ (y-y_c)^2= R_c^2. IF those circles all intersect, then they will, generally, intersect in one point- but there are special cases in which they will intersect in more than one point. Solve those equationsw for x, y, and z.
I have assumed that you are talking about points in a plane. In three dimensions, you would need four sensors to specify a point.
