Finding the Third Proportional to 870,678 and 1,345,419

Step by Step Solution

1. Step 1: Write the proportion equation
   870,678 : 1,345,419 = 1,345,419 : x
2. Step 2: Convert to fraction form
   870,678/1,345,419 = 1,345,419/x
3. Step 3: Cross multiply
   870,678x = 1,345,419 × 1,345,419
4. Step 4: Simplify right side
   870,678x = 1,810,152,285,561
5. Step 5: Solve for x
   x = 1,810,152,285,561/870,678
6. Step 6: Final answer
   x = 2,079,014.61