Finding the Third Proportional to 822,399 and 1,290,393

Step by Step Solution

1. Step 1: Write the proportion equation
   822,399 : 1,290,393 = 1,290,393 : x
2. Step 2: Convert to fraction form
   822,399/1,290,393 = 1,290,393/x
3. Step 3: Cross multiply
   822,399x = 1,290,393 × 1,290,393
4. Step 4: Simplify right side
   822,399x = 1,665,114,094,449
5. Step 5: Solve for x
   x = 1,665,114,094,449/822,399
6. Step 6: Final answer
   x = 2,024,703.45