Finding the Third Proportional to 688,314 and 1,036,636

Step by Step Solution

1. Step 1: Write the proportion equation
   688,314 : 1,036,636 = 1,036,636 : x
2. Step 2: Convert to fraction form
   688,314/1,036,636 = 1,036,636/x
3. Step 3: Cross multiply
   688,314x = 1,036,636 × 1,036,636
4. Step 4: Simplify right side
   688,314x = 1,074,614,196,496
5. Step 5: Solve for x
   x = 1,074,614,196,496/688,314
6. Step 6: Final answer
   x = 1,561,226.70