CREATE TABLE table_19718 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Record" CLOB, "Game Site" CLOB, "Attendance" FLOAT)

On which week was the attendance 74303?
SELECT MAX("Week") FROM table_19718 WHERE "Attendance" = '74303'
SELECT MAX("Week") FROM "table_19718" WHERE "Attendance" = '74303'