Finding the Third Proportional to 555,776 and 861,123

Step by Step Solution

1. Step 1: Write the proportion equation
   555,776 : 861,123 = 861,123 : x
2. Step 2: Convert to fraction form
   555,776/861,123 = 861,123/x
3. Step 3: Cross multiply
   555,776x = 861,123 × 861,123
4. Step 4: Simplify right side
   555,776x = 741,532,821,129
5. Step 5: Solve for x
   x = 741,532,821,129/555,776
6. Step 6: Final answer
   x = 1,334,229.66