Raster spatial resolution decimal degrees to meters

Hello ArcGIS forum:

I am currently working with data from Burundi. I have downloaded the population data from WorldPop. The data has a SPATIAL RESOLUTION: 0.000833333 decimal degrees (approx 100m at the equator) and a PROJECTION: Geographic, WGS84.

I am working with an extension that has formulas which work with variables expressed in the metric system; thus, I need the spatial resolution to be in meters. Does anyone have any idea how to change the spatial resolution of a raster from decimal degrees to meters?

Thank you
Ulises