Finding the Third Proportional to 621,830 and 1,342,912

Step by Step Solution

1. Step 1: Write the proportion equation
   621,830 : 1,342,912 = 1,342,912 : x
2. Step 2: Convert to fraction form
   621,830/1,342,912 = 1,342,912/x
3. Step 3: Cross multiply
   621,830x = 1,342,912 × 1,342,912
4. Step 4: Simplify right side
   621,830x = 1,803,412,639,744
5. Step 5: Solve for x
   x = 1,803,412,639,744/621,830
6. Step 6: Final answer
   x = 2,900,169.89