square root in solidity

Question

I read here: http://solidity.readthedocs.io/en/develop/types.html

that...

If any of the two is fractional, bit operations are disallowed and exponentiation is disallowed if the exponent is fractional (because that might result in a non-rational number).

Is there a workaround?

I am trying to achieve this:

minerFeeReward += totalSupply**0.5;