uploading Image from Xamarin Forms to Server

hi
i have a webservice running but say the webservice address is :
estateservice.estate.com

i can upload the image to the upload folder in this domain

but my main application is in
estate.com

now the image is needed in this domain but as far as i know i when my webapi is in estaterservice i cannot upload the image directly to estate.com right ?

very puzzled as to how to do this. anyone can pls. guide me as to how to go around this pls.