已知曲线\(f(x)= \dfrac{{\log }_{2}(x+1)}{x+1}(x > 0) \)上有一点列\({P}_{n}({x}_{n},{y}_{n})(n∈{N}_{∗}) \),过点\({P}_{n} \)在\(x \)轴上的射影是\({Q}_{n}({x}_{n},0) \),且\({x}_{1}+{x}_{2}+{x}_{3}+⋯{x}_{n}={2}^{n+1}−n−2. (n∈{N}_{∗}) \)
\((1)\)求数列\(\{{x}_{n}\} \)的通项公式
\((2)\)设四边形\({P}_{n}{Q}_{n}{Q}_{n+1}{P}_{n+1} \)的面积是\({S}_{n} \),求\({S}_{n} \)
\((3)\)在\((2) \)条件下,求证:\(\dfrac{1}{{S}_{1}}+ \dfrac{1}{2{S}_{2}}+⋯+ \dfrac{1}{n{S}_{n}} < 4. \)