To find the value of x in the equation, we need to solve for x by following the order of operations (parentheses, exponents, multiplication and division, addition and subtraction):

x + 506 * 198 - 63295 = 464303

First, we need to perform the multiplication:

x + 100188 - 63295 = 464303

Next, we combine like terms:

x + 36893 = 464303

Now, we isolate x by subtracting 36893 from both sides:

x = 464303 - 36893
x = 427410

Therefore, the value of x is 427410.