Simplify. \\[ \\begin{array}{l} \\left(16 x^{4}\ ight)^{\\frac{1}{2}} \\div\\left(27 x^{6}\ ight)^{\\frac{1}{3}}\\left(x^{3}\ ight)^{3} \\\\ \\left(8 x^{\\wedge} 6\ ight) / 9 \\\\ (4 / 3) x^{\\wedge} 9 \\\\ 4 /\\left(3 x^{\\wedge} 9\ ight) \\\\ (8 / 9) x^{\\wedge} 9 \\end{array} \\]