How is the distribution managed when a third claimant arrives after the second claimant limits their pre-emption share?

Primary text

If a third claimant arrives, they have the right to take one-third of what the second claimant holds, which is then added to what the first claimant holds. They then divide the total equally between themselves (the first and third claimants). For example, if the share was eighteen units, the second claimant retained a certain amount (derived from leaving one-sixth that was rightfully theirs, two-thirds of which belonged to the second claimant, amounting to one-ninth), which was then divided equally between the first and third claimants. The distribution results in the second claimant receiving four shares, and each of the other two partners (the first and third) receiving seven shares out of eighteen.