Rights issues: How do I estimate what the share price *now* would have been before a rights issue?

IAG SA had a significant rights issuance in September (details below). Given the share price now (~200p), I want to estimate what the equivalent price would have been before the rights issuance. How do I go about doing that?

"Proposed 3 for 2Capital Increase of 2,979,443,376 New Shares at €0.92per New Share"
https://www.iairgroup.com/~/media/Files/I/IAG/capital-increase-documents/en/prospectus.pdf

Many thanks,
A