Finding the Third Proportional to 518,124 and 1,221,348

Step by Step Solution

1. Step 1: Write the proportion equation
   518,124 : 1,221,348 = 1,221,348 : x
2. Step 2: Convert to fraction form
   518,124/1,221,348 = 1,221,348/x
3. Step 3: Cross multiply
   518,124x = 1,221,348 × 1,221,348
4. Step 4: Simplify right side
   518,124x = 1,491,690,937,104
5. Step 5: Solve for x
   x = 1,491,690,937,104/518,124
6. Step 6: Final answer
   x = 2,879,023.05