To find the antilogarithm of a given logarithmic value, you can use the base of the logarithm to calculate its power. Assuming that this is the common logarithm (base 10), the antilogarithm of 1.2086 is calculated as follows:
\[ \text{Antilogarithm} = 10^{1.2086} \]
Using a calculator:
\[ 10^{1.2086} \approx 16.12 \]
Therefore, the antilogarithm of 1.2086 is approximately 16.12.