Hello I would like to create a calculated field the projection of an annualized figure, so that

[Annualized figure] = [year-to-date value] + [projection]

is true.

I have a date column spanning three years and a column to sum up. Basically it would look like this:

Row Labels        Year-to-date value      projection      grand total (the annualized figure)
2013                 100                     0                100
2014                 130                     0                130
2015                  70                     75               145
What would the calculated field be for the projection column within the pivot table? Something based off my date and year-to-date value obviously.