CREATE TABLE table_204_592 (id DECIMAL, "#" DECIMAL, "title" TEXT, "type" TEXT, "opening\ date" TEXT, "closing\ date" TEXT, "performances" DECIMAL, "comment" TEXT)

how many combined performances have the top three longest running broadway shows had ?
SELECT SUM("performances") FROM table_204_592 WHERE "#" <= 3
SELECT SUM("performances") FROM "table_204_592" WHERE "#" <= 3