Euler Project: Problem 2

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

Prelude Data.Numbers.Fibonacci> sum [x| x <- tail $ map fib [1..50], x < 4000000, even x]
4613732