Finding the Third Proportional to 1,289,256 and 2,684,463

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289,256 : 2,684,463 = 2,684,463 : x
2. Step 2: Convert to fraction form
   1,289,256/2,684,463 = 2,684,463/x
3. Step 3: Cross multiply
   1,289,256x = 2,684,463 × 2,684,463
4. Step 4: Simplify right side
   1,289,256x = 7,206,341,598,369
5. Step 5: Solve for x
   x = 7,206,341,598,369/1,289,256
6. Step 6: Final answer
   x = 5,589,535.05