Finding the Third Proportional to 1,821,220 and 2,672,780

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821,220 : 2,672,780 = 2,672,780 : x
2. Step 2: Convert to fraction form
   1,821,220/2,672,780 = 2,672,780/x
3. Step 3: Cross multiply
   1,821,220x = 2,672,780 × 2,672,780
4. Step 4: Simplify right side
   1,821,220x = 7,143,752,928,400
5. Step 5: Solve for x
   x = 7,143,752,928,400/1,821,220
6. Step 6: Final answer
   x = 3,922,509.60