Finding the Third Proportional to 606,678 and 1,306,380

Step by Step Solution

1. Step 1: Write the proportion equation
   606,678 : 1,306,380 = 1,306,380 : x
2. Step 2: Convert to fraction form
   606,678/1,306,380 = 1,306,380/x
3. Step 3: Cross multiply
   606,678x = 1,306,380 × 1,306,380
4. Step 4: Simplify right side
   606,678x = 1,706,628,704,400
5. Step 5: Solve for x
   x = 1,706,628,704,400/606,678
6. Step 6: Final answer
   x = 2,813,071.69