Finding the Third Proportional to 840,228 and 1,291,491

Step by Step Solution

1. Step 1: Write the proportion equation
   840,228 : 1,291,491 = 1,291,491 : x
2. Step 2: Convert to fraction form
   840,228/1,291,491 = 1,291,491/x
3. Step 3: Cross multiply
   840,228x = 1,291,491 × 1,291,491
4. Step 4: Simplify right side
   840,228x = 1,667,949,003,081
5. Step 5: Solve for x
   x = 1,667,949,003,081/840,228
6. Step 6: Final answer
   x = 1,985,114.76