Finding the Third Proportional to 1,247,447 and 2,686,742

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247,447 : 2,686,742 = 2,686,742 : x
2. Step 2: Convert to fraction form
   1,247,447/2,686,742 = 2,686,742/x
3. Step 3: Cross multiply
   1,247,447x = 2,686,742 × 2,686,742
4. Step 4: Simplify right side
   1,247,447x = 7,218,582,574,564
5. Step 5: Solve for x
   x = 7,218,582,574,564/1,247,447
6. Step 6: Final answer
   x = 5,786,684.78