Finding the Third Proportional to 363,900 and 789,648

Step by Step Solution

1. Step 1: Write the proportion equation
   363,900 : 789,648 = 789,648 : x
2. Step 2: Convert to fraction form
   363,900/789,648 = 789,648/x
3. Step 3: Cross multiply
   363,900x = 789,648 × 789,648
4. Step 4: Simplify right side
   363,900x = 623,543,963,904
5. Step 5: Solve for x
   x = 623,543,963,904/363,900
6. Step 6: Final answer
   x = 1,713,503.61