1. **State the problem:** Solve the equation $$3.4d = 17.34$$ for the variable $$d$$. 2. **Formula and rules:** To isolate $$d$$, divide both sides of the equation by $$3.4$$. 3. **Divide both sides:** $$d = \frac{17.34}{3.4}$$ 4. **Simplify the fraction:** $$d = \frac{\cancel{17.34}}{\cancel{3.4}} = 5.1$$ 5. **Answer:** The value of $$d$$ is $$5.1$$. This means that when $$d = 5.1$$, the equation $$3.4d = 17.34$$ holds true.