Finding the Third Proportional to 844,690 and 1,821,410

Step by Step Solution

1. Step 1: Write the proportion equation
   844,690 : 1,821,410 = 1,821,410 : x
2. Step 2: Convert to fraction form
   844,690/1,821,410 = 1,821,410/x
3. Step 3: Cross multiply
   844,690x = 1,821,410 × 1,821,410
4. Step 4: Simplify right side
   844,690x = 3,317,534,388,100
5. Step 5: Solve for x
   x = 3,317,534,388,100/844,690
6. Step 6: Final answer
   x = 3,927,517.06