To find the combined mass of the two skyscrapers, we simply add their masses together.
The masses are:
- Skyscraper 1: \(2.2 \times 10^5\) tons
- Skyscraper 2: \(3.7 \times 10^5\) tons
Now, we add them:
\[ 2.2 \times 10^5 + 3.7 \times 10^5 = (2.2 + 3.7) \times 10^5 \]
Calculating the sum inside the parentheses:
\[ 2.2 + 3.7 = 5.9 \]
Now, we can express the combined mass:
\[ 5.9 \times 10^5 \text{ tons} \]
So, the combined mass of the two skyscrapers is:
\[ \boxed{5.9 \times 10^5} \text{ tons} \]