Berean Study Bible
“Behold,” says the Teacher, “I have discovered this by adding one thing to another to find an explanation.

King James Bible
Behold, this have I found, saith the preacher, counting one by one, to find out the account:

American Standard Version
Behold, this have I found, saith the Preacher, laying one thing to another, to find out the account;

Darby Bible Translation
See this which I have found, saith the Preacher, [searching] one by one to find out the reason;

Douay-Rheims Bible
Lo this have I found, said Ecclesiastes, weighing one thing after another, that I might find out the account,

English Revised Version
Behold, this have I found, saith the Preacher; laying one thing to another, to find out the account:

Young's Literal Translation
See, this I have found, said the Preacher, one to one, to find out the reason