What is the last step in the proper order for throwing a switch?

The last step in the proper order for throwing a switch is to make sure the switch point is flush against the stock rail. This is crucial because the alignment of the switch points directly affects the safe passage of trains. If the switch point is not properly aligned, it could result in a derailment or other accidents as the train tries to pass. Ensuring that the switch point is flush means that there are no gaps or obstructions between the switch and the stock rail, allowing for a smooth transition for the train's wheels.

Checking for tension and looking both ways before crossing tracks are important steps but occur earlier in the sequence to ensure safety and that the switch is ready for operation. Bringing the latch to the opposite side is also a necessary action, but it typically would follow the adjustment checks to confirm that the switch is in its proper position before securing it. Thus, verifying the fit of the switch point against the stock rail is a critical final measure to ensure the entire switching process is conducted correctly and safely.