Finding the Third Proportional to 1,578,287 and 3,478,306

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,287 : 3,478,306 = 3,478,306 : x
2. Step 2: Convert to fraction form
   1,578,287/3,478,306 = 3,478,306/x
3. Step 3: Cross multiply
   1,578,287x = 3,478,306 × 3,478,306
4. Step 4: Simplify right side
   1,578,287x = 12,098,612,629,636
5. Step 5: Solve for x
   x = 12,098,612,629,636/1,578,287
6. Step 6: Final answer
   x = 7,665,660.70