In this question 

We follow BODMAS rule and then apply Rule of Decimals,

$\begin{array}{l}\text{So, 34.596 + 61.4 72 - 496.708}\\ \text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}= ?+ 27.271}\\ \Rightarrow \text{ 96.068}-\text{496.708= ?+ 27.271}\\ \Rightarrow \text{ 27.271+ 496.708- 96.068}\\ \Rightarrow \text{\hspace{0.17em}\hspace{0.17em}?= 523.979 - 96.068= 427.911}\end{array}$

Hence, Option E is correct.