def extract_capabilities(data):
    """
    Extracts relevant information from a list of capabilities.

    Args:
        data (list): A list of tuples containing capability metadata.

    Returns:
        tuple: A tuple containing the maximum value and its corresponding index.
    """
    max_value = max(cap[1] for cap in data)
    max_index = [i for i, cap in enumerate(data) if cap[1] == max_value][0]
    return (max_value, max_index)

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

max_value, max_index = extract_capabilities(capabilities)
print(f"Maximum value: {max_value}, Index: {max_index}")