Interpolation in EXCEL

I am trying to perform non-linear interpolation in EXCEL. I have known X and Y values and I want to find corresponding Y values for new Xs.
Any help will be really appreciated.
e.g.
Known X Known Y
1860.00 0.15
1926.47 2.12
1927.18 2.31
1929.10 2.70
1929.17 3.08


What will be the Y's for the following Xs
1920.041667
1920.125
1920.208333
1920.291667

The First thing to do is to plot your data on an XY scatter chart.
Then try to fit a trend line through the points.

I've done that and your data is horrid!
The best fit is probably an exponential line, but that is not very good.

What error bands do you have on this data?
Do you have any clues from the process that generated the data as to what the shape of the graph should be?

Anyway you could try takeing the natural log of your Y values
(use the function LN)
then use a linear forecast on the X and LN(Y) data.
then use EXP to reverse the effect of the logarithm.

For 1920.125 this gives 1.824