CREATE TABLE "singapore_airlines_operating_highlights_" (
  "year_ended" text,
  "passengers_thousand" real,
  "rpk_million" real,
  "ask_million" real,
  "load_factor_pct" real,
  "yield_s_km" real
);

Question: What is the highest yield when the ASK is greater than 88,252.7, an RPK of 74,183.2, and a load factor less than 74.5?
SQL: SELECT MAX("yield_s_km") FROM "singapore_airlines_operating_highlights_" WHERE "ask_million">'88,252.7' AND "rpk_million"='74,183.2' AND "load_factor_pct"<74.5;