Finding the Third Proportional to 876,434 and 1,320,420

Step by Step Solution

1. Step 1: Write the proportion equation
   876,434 : 1,320,420 = 1,320,420 : x
2. Step 2: Convert to fraction form
   876,434/1,320,420 = 1,320,420/x
3. Step 3: Cross multiply
   876,434x = 1,320,420 × 1,320,420
4. Step 4: Simplify right side
   876,434x = 1,743,508,976,400
5. Step 5: Solve for x
   x = 1,743,508,976,400/876,434
6. Step 6: Final answer
   x = 1,989,321.47