Finding the Third Proportional to 555,765 and 861,105

Step by Step Solution

1. Step 1: Write the proportion equation
   555,765 : 861,105 = 861,105 : x
2. Step 2: Convert to fraction form
   555,765/861,105 = 861,105/x
3. Step 3: Cross multiply
   555,765x = 861,105 × 861,105
4. Step 4: Simplify right side
   555,765x = 741,501,821,025
5. Step 5: Solve for x
   x = 741,501,821,025/555,765
6. Step 6: Final answer
   x = 1,334,200.28