Finding the Third Proportional to 368,640 and 789,504

Step by Step Solution

1. Step 1: Write the proportion equation
   368,640 : 789,504 = 789,504 : x
2. Step 2: Convert to fraction form
   368,640/789,504 = 789,504/x
3. Step 3: Cross multiply
   368,640x = 789,504 × 789,504
4. Step 4: Simplify right side
   368,640x = 623,316,566,016
5. Step 5: Solve for x
   x = 623,316,566,016/368,640
6. Step 6: Final answer
   x = 1,690,854.40