How do I work out reactance without inductance

Q:

The power taken by an indctive circuit when connected to 100V, 50Hz supply is 500Watt and the current is 8A.

Work Out
(1) The Resistance (DONE THIS)
(2) The Impedance (DONE THIS)
(3) The Reactance????????????????????
(4) The Power factor of the circuit?

Thanks in advance.

Use:

Z^2 = R^2 + X^2

pf = W / VA