Finding the Third Proportional to 557,820 and 1,219,320

Step by Step Solution

1. Step 1: Write the proportion equation
   557,820 : 1,219,320 = 1,219,320 : x
2. Step 2: Convert to fraction form
   557,820/1,219,320 = 1,219,320/x
3. Step 3: Cross multiply
   557,820x = 1,219,320 × 1,219,320
4. Step 4: Simplify right side
   557,820x = 1,486,741,262,400
5. Step 5: Solve for x
   x = 1,486,741,262,400/557,820
6. Step 6: Final answer
   x = 2,665,270.63