The fourth proportional to 12, 14 and 18 is? Choices.
A) 21
B) 66
C) 88
D) 99
E) 26
(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?