sides of cyclic quadrilateral are 9,10,12 and 16.if one of its diagonal is 14.find the other diagonal?

For every cyclic quadrilateral ABCD,
AC X BD = [AB X CD] + [AD X BC]
so 14 X BD = 9 X 12 + 10 X 16
14 X BD = 108 + 160
BD = 268 / 14
BD = 19.1428