Finding the Third Proportional to 621,810 and 1,328,940

Step by Step Solution

1. Step 1: Write the proportion equation
   621,810 : 1,328,940 = 1,328,940 : x
2. Step 2: Convert to fraction form
   621,810/1,328,940 = 1,328,940/x
3. Step 3: Cross multiply
   621,810x = 1,328,940 × 1,328,940
4. Step 4: Simplify right side
   621,810x = 1,766,081,523,600
5. Step 5: Solve for x
   x = 1,766,081,523,600/621,810
6. Step 6: Final answer
   x = 2,840,226.96