Finding the Third Proportional to 369,314 and 789,820

Step by Step Solution

1. Step 1: Write the proportion equation
   369,314 : 789,820 = 789,820 : x
2. Step 2: Convert to fraction form
   369,314/789,820 = 789,820/x
3. Step 3: Cross multiply
   369,314x = 789,820 × 789,820
4. Step 4: Simplify right side
   369,314x = 623,815,632,400
5. Step 5: Solve for x
   x = 623,815,632,400/369,314
6. Step 6: Final answer
   x = 1,689,119.92