SELECT "Isolation" FROM table_23186 WHERE "Prominence" = '1340.549 = 4,397feet 1,340m'
What's the isolation of the mountain peak with a prominence of 1340.549 = 4,397feet 1,340m?
CREATE TABLE table_23186 (
    "Rank" real,
    "Mountain Peak" text,
    "Mountain Range" text,
    "Elevation" text,
    "Prominence" text,
    "Isolation" text
)