Finding the Third Proportional to 844,680 and 1,821,390

Step by Step Solution

1. Step 1: Write the proportion equation
   844,680 : 1,821,390 = 1,821,390 : x
2. Step 2: Convert to fraction form
   844,680/1,821,390 = 1,821,390/x
3. Step 3: Cross multiply
   844,680x = 1,821,390 × 1,821,390
4. Step 4: Simplify right side
   844,680x = 3,317,461,532,100
5. Step 5: Solve for x
   x = 3,317,461,532,100/844,680
6. Step 6: Final answer
   x = 3,927,477.31