Finding the Third Proportional to 1,278,710 and 1,909,312

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,710 : 1,909,312 = 1,909,312 : x
2. Step 2: Convert to fraction form
   1,278,710/1,909,312 = 1,909,312/x
3. Step 3: Cross multiply
   1,278,710x = 1,909,312 × 1,909,312
4. Step 4: Simplify right side
   1,278,710x = 3,645,472,313,344
5. Step 5: Solve for x
   x = 3,645,472,313,344/1,278,710
6. Step 6: Final answer
   x = 2,850,898.42