Finding the Third Proportional to 1,199,815 and 1,687,456

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199,815 : 1,687,456 = 1,687,456 : x
2. Step 2: Convert to fraction form
   1,199,815/1,687,456 = 1,687,456/x
3. Step 3: Cross multiply
   1,199,815x = 1,687,456 × 1,687,456
4. Step 4: Simplify right side
   1,199,815x = 2,847,507,751,936
5. Step 5: Solve for x
   x = 2,847,507,751,936/1,199,815
6. Step 6: Final answer
   x = 2,373,289.01