Finding the Third Proportional to 840,456 and 1,257,714

Step by Step Solution

1. Step 1: Write the proportion equation
   840,456 : 1,257,714 = 1,257,714 : x
2. Step 2: Convert to fraction form
   840,456/1,257,714 = 1,257,714/x
3. Step 3: Cross multiply
   840,456x = 1,257,714 × 1,257,714
4. Step 4: Simplify right side
   840,456x = 1,581,844,505,796
5. Step 5: Solve for x
   x = 1,581,844,505,796/840,456
6. Step 6: Final answer
   x = 1,882,126.50