Finding the Third Proportional to 628,679 and 1,286,410

Step by Step Solution

1. Step 1: Write the proportion equation
   628,679 : 1,286,410 = 1,286,410 : x
2. Step 2: Convert to fraction form
   628,679/1,286,410 = 1,286,410/x
3. Step 3: Cross multiply
   628,679x = 1,286,410 × 1,286,410
4. Step 4: Simplify right side
   628,679x = 1,654,850,688,100
5. Step 5: Solve for x
   x = 1,654,850,688,100/628,679
6. Step 6: Final answer
   x = 2,632,266.53