CREATE TABLE table_46242 ("School" TEXT, "Location" TEXT, "Founded" FLOAT, "Enrollment" FLOAT, "Nickname" TEXT)

What is the most recent year founded with an enrollment of 42,708?
SELECT MAX("Founded") FROM table_46242 WHERE "Enrollment" = '42,708'
SELECT MAX("Founded") FROM "table_46242" WHERE "Enrollment" = '42,708'