def calculate_max_capability(capabilities):
    """
    Calculate maximum capability from a list of tuples.

    Args:
        capabilities (list): List of tuples containing capability data.

    Returns:
        tuple: Maximum capability as a tuple.
    """
    return max(capabilities, key=lambda x: x[1])

# Example usage
capabilities = [('v5_1768236144', 108217.11959687909, 721, 15009.3),
                ('v5_1768235312', 89435.63603047856, 734, 12184.7),
                ('v5_1768235983', 98379.19963352643, 987, 9967.5)]

print(calculate_max_capability(capabilities))