Finding the Third Proportional to 1,278,708 and 1,909,308

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,708 : 1,909,308 = 1,909,308 : x
2. Step 2: Convert to fraction form
   1,278,708/1,909,308 = 1,909,308/x
3. Step 3: Cross multiply
   1,278,708x = 1,909,308 × 1,909,308
4. Step 4: Simplify right side
   1,278,708x = 3,645,457,038,864
5. Step 5: Solve for x
   x = 3,645,457,038,864/1,278,708
6. Step 6: Final answer
   x = 2,850,890.93