To find 122.6% of 213, you can convert the percentage to a decimal and then multiply.
First, convert 122.6% to a decimal:
\[ 122.6% = \frac{122.6}{100} = 1.226 \]
Next, multiply this decimal by 213:
\[ 1.226 \times 213 = 260.058 \]
Now, round this result to the nearest tenth:
\[ 260.058 \approx 260.1 \]
Thus, 122.6% of 213 rounded to the nearest tenth is 260.1.