If ln{ln[ln(lnx)]} = 0, then ln[ln(lnx)] = 1, then ln(ln(x)) = e, then ln(x) =, then x = . The problem asks to find such real value "k" that x = = . So, this value of "k" is k = = = 15.15421 (approximately). ANSWER. k = = = 15.15421 (approximately).