Finding the Third Proportional to 822,456 and 1,290,485

Step by Step Solution

1. Step 1: Write the proportion equation
   822,456 : 1,290,485 = 1,290,485 : x
2. Step 2: Convert to fraction form
   822,456/1,290,485 = 1,290,485/x
3. Step 3: Cross multiply
   822,456x = 1,290,485 × 1,290,485
4. Step 4: Simplify right side
   822,456x = 1,665,351,535,225
5. Step 5: Solve for x
   x = 1,665,351,535,225/822,456
6. Step 6: Final answer
   x = 2,024,851.83