Finding the Third Proportional to 685,586 and 1,404,580

Step by Step Solution

1. Step 1: Write the proportion equation
   685,586 : 1,404,580 = 1,404,580 : x
2. Step 2: Convert to fraction form
   685,586/1,404,580 = 1,404,580/x
3. Step 3: Cross multiply
   685,586x = 1,404,580 × 1,404,580
4. Step 4: Simplify right side
   685,586x = 1,972,844,976,400
5. Step 5: Solve for x
   x = 1,972,844,976,400/685,586
6. Step 6: Final answer
   x = 2,877,603.94