Compute the point to point distance, D$1$ between points A and B given the following information

Geodetic Chord distance, D$3$ is $12223\mathrm{.}152$ m

Geodetic height at A is $434\mathrm{.}882$ m

Geodetic height at B is $199\mathrm{.}464$ m

R$\backslash$alpha from A to B is $6376526\mathrm{.}384$

Round answer to $3$ decimal places