Finding the Third Proportional to 368,469 and 781,219.69

Step by Step Solution

1. Step 1: Write the proportion equation
   368,469 : 781,219.69 = 781,219.69 : x
2. Step 2: Convert to fraction form
   368,469/781,219.69 = 781,219.69/x
3. Step 3: Cross multiply
   368,469x = 781,219.69 × 781,219.69
4. Step 4: Simplify right side
   368,469x = 610,304,200,137.60
5. Step 5: Solve for x
   x = 610,304,200,137.60/368,469
6. Step 6: Final answer
   x = 1,656,324.41