Select the wrongly spelt

What will come in place of the question mark (?) in the following series?

4000, ?, 320, 192, 153.6, 153.6

5      3      4      7.5      17       ?       138

24   12   18   ?   157.5   708.75   3,898.125

Find the missing number in the given number series.

98, 89, 114, 50, 194, ?

188        178       158      ?      88       38

1290, 1225, 1175, ?, 1112, 1095, 1085

Find the missing number in the given number series.

2, 7, 19, 62, ?, 1270 

64, 80, 120, 210, ?,  945

216, 81, 297, 378, ?, 1035, 1728