The straight line BD is parallel to CA and intersects the coordinate plane XOZ at point d,

Let D(x, 0, z)

Vector CA=(0, -2, 5)

Vector BD=(x-2, -2, z)

Vector CA and vector BD*** lines, so

x-2=0 5/z= 1

So x=2 z=5.

D(2，0，5)