Finding the Third Proportional to 568,389 and 1,215,555

Step by Step Solution

1. Step 1: Write the proportion equation
   568,389 : 1,215,555 = 1,215,555 : x
2. Step 2: Convert to fraction form
   568,389/1,215,555 = 1,215,555/x
3. Step 3: Cross multiply
   568,389x = 1,215,555 × 1,215,555
4. Step 4: Simplify right side
   568,389x = 1,477,573,958,025
5. Step 5: Solve for x
   x = 1,477,573,958,025/568,389
6. Step 6: Final answer
   x = 2,599,582.25