7. The mountain summits of K2, Kanchenjunga, Lhostse, Macula and Cho Oyu have respective heights of 8,611m, 8586m, 8,516m, 8,486m and 8,188m. The line parent to these mountains is Mount Everest, which is 4.324% taller than the mean heights of these 5 mountains. What is the height of mount Everest?