Finding the Third Proportional to 1,278,786 and 1,909,404

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,786 : 1,909,404 = 1,909,404 : x
2. Step 2: Convert to fraction form
   1,278,786/1,909,404 = 1,909,404/x
3. Step 3: Cross multiply
   1,278,786x = 1,909,404 × 1,909,404
4. Step 4: Simplify right side
   1,278,786x = 3,645,823,635,216
5. Step 5: Solve for x
   x = 3,645,823,635,216/1,278,786
6. Step 6: Final answer
   x = 2,851,003.71