Find the value of $x$. Round to the nearest tenth.

Step 1 ：Assume x = 3.45

Step 2 ：Round x to the nearest tenth

Step 3 ：x is just as close to 3.4 as it is to 3.5

Step 4 ：Round up according to rounding rules

Step 5 ：Rounded value of x is 3.5

Step 6 ：Check the result

Step 7 ：Final answer: \boxed{3.5}