What is the ruling of Islamic law on taking financial compensation from the state for a property that was expropriated for public benefit, given that the determined compensation amount is less than one-third of the property's real value? And is it permissible to resort to engineering and legal offices to increase the compensation amount in exchange for a percentage of this compensation, with the possibility of paying sums of money to some state employees to finalize this?

The state is permitted to seize private property for public interest, provided there is just and immediate compensation. If the compensation is less than one-third of the property's market value, then that is an injustice, and the owner has the right to demand the remainder of his due. He may pursue the recovery of his right through any legitimate means, including appointing someone to seek it on his behalf for a known fee. It is not permissible for the fee to be a percentage of an unknown compensation according to the majority of jurists, unless the uncertainty does not prevent delivery, such as when the fee becomes known upon the fulfillment of the right and the lawyer's success.