Finding the Third Proportional to 621,864 and 1,342,980

Step by Step Solution

1. Step 1: Write the proportion equation
   621,864 : 1,342,980 = 1,342,980 : x
2. Step 2: Convert to fraction form
   621,864/1,342,980 = 1,342,980/x
3. Step 3: Cross multiply
   621,864x = 1,342,980 × 1,342,980
4. Step 4: Simplify right side
   621,864x = 1,803,595,280,400
5. Step 5: Solve for x
   x = 1,803,595,280,400/621,864
6. Step 6: Final answer
   x = 2,900,305.02