Finding the Third Proportional to 685,584 and 1,404,576

Step by Step Solution

1. Step 1: Write the proportion equation
   685,584 : 1,404,576 = 1,404,576 : x
2. Step 2: Convert to fraction form
   685,584/1,404,576 = 1,404,576/x
3. Step 3: Cross multiply
   685,584x = 1,404,576 × 1,404,576
4. Step 4: Simplify right side
   685,584x = 1,972,833,739,776
5. Step 5: Solve for x
   x = 1,972,833,739,776/685,584
6. Step 6: Final answer
   x = 2,877,595.95