Finding the Third Proportional to 642,708 and 1,314,900

Step by Step Solution

1. Step 1: Write the proportion equation
   642,708 : 1,314,900 = 1,314,900 : x
2. Step 2: Convert to fraction form
   642,708/1,314,900 = 1,314,900/x
3. Step 3: Cross multiply
   642,708x = 1,314,900 × 1,314,900
4. Step 4: Simplify right side
   642,708x = 1,728,962,010,000
5. Step 5: Solve for x
   x = 1,728,962,010,000/642,708
6. Step 6: Final answer
   x = 2,690,120.57