Finding the Third Proportional to 621,208 and 1,323,760

Step by Step Solution

1. Step 1: Write the proportion equation
   621,208 : 1,323,760 = 1,323,760 : x
2. Step 2: Convert to fraction form
   621,208/1,323,760 = 1,323,760/x
3. Step 3: Cross multiply
   621,208x = 1,323,760 × 1,323,760
4. Step 4: Simplify right side
   621,208x = 1,752,340,537,600
5. Step 5: Solve for x
   x = 1,752,340,537,600/621,208
6. Step 6: Final answer
   x = 2,820,859.58