Arrange the digits 4, 1, 7 in descending order to get the greatest number: 7, 4, 1 &rarr; 741.<br><br>
&bull; To get the second greatest, keep the first digit the same (7) and swap the other two digits.<br>
&bull; 7, 1, 4 &rarr; 714<br>
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Final Answer: 714