JSFiddle - React, Tailwind, and code Playground

JavaScript

var totals = [
    ['john', 'test', 45],
    ['john', 'test', 46],
    ['john', 'test', 42],
    ['john', 'test', 41]
];

var biggest = totals.reduce((a, b) => a[2] > b[2] ? a : b);
console.log(biggest);