To find any nth root of a number in Excel, use the POWER function with the formula '=POWER(number, 1/n)'. Here, replace 'number' with the value for which you want to find the nth root, and 'n' with the degree of the root. For instance, to find the cubic root (3rd root) of 27, you would use '=POWER(27, 1/3)', which returns 3. This method is efficiently versatile, allowing you to calculate not just square roots but any nth roots.