Finding the Third Proportional to 359,816 and 789,616

Step by Step Solution

1. Step 1: Write the proportion equation
   359,816 : 789,616 = 789,616 : x
2. Step 2: Convert to fraction form
   359,816/789,616 = 789,616/x
3. Step 3: Cross multiply
   359,816x = 789,616 × 789,616
4. Step 4: Simplify right side
   359,816x = 623,493,427,456
5. Step 5: Solve for x
   x = 623,493,427,456/359,816
6. Step 6: Final answer
   x = 1,732,811.85