Math Problem Solver

Original numbers in ascending order: $138840$, $216211$, $388649$, $454070$
Sum: $1197770$
Mean: $\frac{598885}{2} = 299442.5$
Sample standard deviation: $\frac{\sqrt{193764326991}}{3} \approx 146728.8985$
Median: $302430$
Mode: No mode