CREATE TABLE table_23186 ("Rank" FLOAT, "Mountain Peak" TEXT, "Mountain Range" TEXT, "Elevation" TEXT, "Prominence" TEXT, "Isolation" TEXT)

What's the isolation of the mountain peak with a prominence of 1340.549 = 4,397feet 1,340m?
SELECT "Isolation" FROM table_23186 WHERE "Prominence" = '1340.549 = 4,397feet 1,340m'
SELECT "Isolation" FROM "table_23186" WHERE "Prominence" = '1340.549 = 4,397feet 1,340m'