Finding the Third Proportional to 688,304 and 1,036,621

Step by Step Solution

1. Step 1: Write the proportion equation
   688,304 : 1,036,621 = 1,036,621 : x
2. Step 2: Convert to fraction form
   688,304/1,036,621 = 1,036,621/x
3. Step 3: Cross multiply
   688,304x = 1,036,621 × 1,036,621
4. Step 4: Simplify right side
   688,304x = 1,074,583,097,641
5. Step 5: Solve for x
   x = 1,074,583,097,641/688,304
6. Step 6: Final answer
   x = 1,561,204.20