Finding the Third Proportional to 1,249,186 and 2,687,860

Step by Step Solution

1. Step 1: Write the proportion equation
   1,249,186 : 2,687,860 = 2,687,860 : x
2. Step 2: Convert to fraction form
   1,249,186/2,687,860 = 2,687,860/x
3. Step 3: Cross multiply
   1,249,186x = 2,687,860 × 2,687,860
4. Step 4: Simplify right side
   1,249,186x = 7,224,591,379,600
5. Step 5: Solve for x
   x = 7,224,591,379,600/1,249,186
6. Step 6: Final answer
   x = 5,783,439.28