The fourth proportional to 12, 14 and 18 is?  Choose the correct answer
A) 21	B) 66	C) 55	D) 88	E) 61
(14*18)/12= 
<gadget id="calculator">(14*18)/12</gadget>
<output>21</output>
21   21nswer:21
<result>A</result>
The fourth proportional to 12, 14 and 18 is?