Finding the Third Proportional to 363,906 and 789,665.63

Step by Step Solution

1. Step 1: Write the proportion equation
   363,906 : 789,665.63 = 789,665.63 : x
2. Step 2: Convert to fraction form
   363,906/789,665.63 = 789,665.63/x
3. Step 3: Cross multiply
   363,906x = 789,665.63 × 789,665.63
4. Step 4: Simplify right side
   363,906x = 623,571,799,306.64
5. Step 5: Solve for x
   x = 623,571,799,306.64/363,906
6. Step 6: Final answer
   x = 1,713,551.85