jmc

We try splitting the quadrilateral into two triangles by drawing the segment $\overline{YW}$. We see that $△YZW$ is a right triangle. We can use the Pythagorean Theorem to solve for the length of the hypotenuse, or we notice that $24$ and $32$ are part of a multiple of the Pythagorean triple $(3,4,5)$: $8(3,4,5)=(24,32,40)$. So the length of the hypotenuse if $△YZW$ is a right triangle is $40$ units. Now we look at $△XYW$ to see if it is also a right triangle. We can use the Pythagorean Theorem to solve for the leg $\overline{YW}$, or we see if $96$ and $104$ are part of a multiple of a Pythagorean triple. We have $\frac{96}{104}=\frac{2^5\cdot 3}{2^3\cdot 13}=2^3\left(\frac{2^2\cdot 3}{13}\right)=8\left(\frac{12}{13}\right)$. So we have a multiple of the Pythagorean triple $(5,12,13)$: $8(5,12,13)=(40,96,104)$. Notice that both triangles give us $YW=40$, so we can safely assume that they are right triangles and the assumption is consistent with the drawing. In a right triangle, the base and height are the two legs, so the area of $△YZW$ is $\frac{1}{2}(32)(24)=384$ and the area of $△XYW$ is $\frac{1}{2}(96)(40)=1920$. The area of the quadrilateral is the sum of the areas of the two triangles, so the area of the quadrilateral is $1920+384=\boxed{2304}$ square units.