We need to evaluate the expression $-9.2 + 4.3 - 12.6$.

1. Problem Description

We need to evaluate the expression $-9.2 + 4.3 - 12.6$.

2. Solution Steps

First, we add $-9.2$ and $4.3$:

$-9.2 + 4.3 = -4.9$

Now we subtract $12.6$ from $-4.9$:

$-4.9 - 12.6 = -4.9 + (-12.6) = -17.5$

3. Final Answer

The final answer is -17.5.