Finding the Third Proportional to 1,278,706 and 1,909,306

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,706 : 1,909,306 = 1,909,306 : x
2. Step 2: Convert to fraction form
   1,278,706/1,909,306 = 1,909,306/x
3. Step 3: Cross multiply
   1,278,706x = 1,909,306 × 1,909,306
4. Step 4: Simplify right side
   1,278,706x = 3,645,449,401,636
5. Step 5: Solve for x
   x = 3,645,449,401,636/1,278,706
6. Step 6: Final answer
   x = 2,850,889.42