I doubt that an answer can be found but that doesn't mean it isn't worth searching for one.
The meaning of life is, in a sense, Merlin's holy grail. It's the search that is important, not the accomplishment. It is something that keeps our gaze on the horizon instead of dropping to our feet.
All the religions, no matter how certain that they, and only they, have the truth, are seeking that meaning and attempting to show it to their adherents. It works to a certain extent, but a cardboard replica from the nickel-and-dime store at your local church, mosque, synagogue or temple, isn't the same as finding the purpose for yourself.
There's a Sufi fable about God giving a crystal to one of his angels. "This crystal contains the truth," he said. "Take it to Earth and give it to the people." On the way the angel was attacked by a demon; they fought and the crystal fell to the ground, splintering into shards. People found a shard and announced, "I have found the truth." In fact, they had found only part of it.
The meaning of life and the quest for the grail are like those shards of crystal. They can give us a glimmer of the underlying reality but there is no way we can see the whole picture.
Frustrating, isn't it?