If three or more players tie for an end-of-round goal on the green (majority) side, follow these steps:

• All tied players place their action cubes on the tied place (e.g., 1st place).
• Do not award the next place(s) that would have been taken by the tied players.
• At game end, add the points for the tied place and the next place(s) that would have been awarded, then divide by the number of tied players and round down.

For example, if three players tie for 1st place (with points for 1st, 2nd, and 3rd being 5, 2, and 1):

• Add 1st, 2nd, and 3rd place points: 5 + 2 + 1 = 8
• Divide by the number of tied players: 8 ÷ 3 = 2.66, rounded down to 2
• Each tied player scores 2 points

This is based on the following rule from page 11:

If players tie, place both cubes on the tied place, and do not award the next place. At game end, you will add the points for that place and the next place(s), then divide by the number of players who tied and round down (4th place scores 0 points).

Source: page 11

Source: Core Rulebook (pp. 1, 11, 2, 5)