Finding the Third Proportional to 822,396 and 1,290,390

Step by Step Solution

1. Step 1: Write the proportion equation
   822,396 : 1,290,390 = 1,290,390 : x
2. Step 2: Convert to fraction form
   822,396/1,290,390 = 1,290,390/x
3. Step 3: Cross multiply
   822,396x = 1,290,390 × 1,290,390
4. Step 4: Simplify right side
   822,396x = 1,665,106,352,100
5. Step 5: Solve for x
   x = 1,665,106,352,100/822,396
6. Step 6: Final answer
   x = 2,024,701.42