Finding the Third Proportional to 518,150 and 1,221,404

Step by Step Solution

1. Step 1: Write the proportion equation
   518,150 : 1,221,404 = 1,221,404 : x
2. Step 2: Convert to fraction form
   518,150/1,221,404 = 1,221,404/x
3. Step 3: Cross multiply
   518,150x = 1,221,404 × 1,221,404
4. Step 4: Simplify right side
   518,150x = 1,491,827,731,216
5. Step 5: Solve for x
   x = 1,491,827,731,216/518,150
6. Step 6: Final answer
   x = 2,879,142.59