A number is 124 more than its one-third. What is that number?

To solve for $x$, first move the term with $x$ to one side:
$x – \frac{1}{3}x = 124$

Combine the $x$ terms:
$\left(1 – \frac{1}{3}\right)x = 124$
$\left(\frac{3}{3} – \frac{1}{3}\right)x = 124$
$\frac{2}{3}x = 124$

Multiply both sides by $\frac{3}{2}$ to isolate $x$:
$x = 124 \times \frac{3}{2}$
$x = (124/2) \times 3$
$x = 62 \times 3$
$x = 186$

The number is 186.