Here are the steps:
Step 1: Open any browser you have already installed.
Step 2: Goto This Link.
Step 3: Click on "Download Chrome" button
Step 4: Click on "Accept and Install"
Step 5: After the Download is complete click on .dmg file. You will get the popup opening chrome...
Step 6: Drag Chrome Icon to Applications
Step 7: All done you can launch the chrome from Application folder