We have found one software suitable in our database for this conversion.
In theory, it should be possible to export old .wkq spreadsheets from Corel Quattro Pro for MS-DOS to PDF format, however it will be very hard to find a program capable of evening viewing the files on modern computers with modern software installed.
Perhaps your best bet is to find old version of Quattro Pro on some abandonware websites and install it in a DOS based virtual machine.
WKQ
A wkq file extension is related to the Corel Quattro Pro, a spreadsheet editing tool. A wkq file stores spreadsheet.
PDF
A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.