Answer:
Vice President.
Speaker of the House.
President Pro Tempore of the Senate.
Secretary of State.
Secretary of the Treasury.
Secretary of Defense.
Attorney General.
Secretary of the Interior
Explanation: If the President of the United States is incapacitated, dies, resigns, is for any reason unable to hold his/her office, or is removed from office, he/she will be replaced in the following order: Vice President. Speaker of the House. President Pro Tempore of the Senate.
then so on.