Finding the Third Proportional to 555,788 and 861,142

Step by Step Solution

1. Step 1: Write the proportion equation
   555,788 : 861,142 = 861,142 : x
2. Step 2: Convert to fraction form
   555,788/861,142 = 861,142/x
3. Step 3: Cross multiply
   555,788x = 861,142 × 861,142
4. Step 4: Simplify right side
   555,788x = 741,565,544,164
5. Step 5: Solve for x
   x = 741,565,544,164/555,788
6. Step 6: Final answer
   x = 1,334,259.73