Suppose $a$, $b$, $c$, and $d$ are positive numbers and each is not equal to $1$.
If $\log_a(d)$, $\log_b(d)$, and $\log_c(d)$ are an arithmetic progression in this order, then what is $(ac)^{\log_a(b)}$ equal to?
Suppose $a$, $b$, $c$, and $d$ are positive numbers and each is not equal to $1$.
If $\log_a(d)$, $\log_b(d)$, and $\log_c(d)$ are an arithmetic progression in this order, then what is $(ac)^{\log_a(b)}$ equal to?