Find the step size from the known numbers at the end.<br><br>
&bull; 4340 to 4540 = +200<br>
&bull; So the pattern increases by 200 each step.<br>
&bull; Working backwards from 4340: 4340 &minus; 200 = 4140<br>
&bull; 4140 &minus; 200 = 3940<br>
&bull; 3940 &minus; 200 = 3740<br>
&bull; Check: 3540, 3740, 3940, 4140, 4340, 4540 &check;<br><br>
Final Answer: A = 3740, B = 3940, C = 4140