Finding the Third Proportional to 259,785 and 539,978

Step by Step Solution

1. Step 1: Write the proportion equation
   259,785 : 539,978 = 539,978 : x
2. Step 2: Convert to fraction form
   259,785/539,978 = 539,978/x
3. Step 3: Cross multiply
   259,785x = 539,978 × 539,978
4. Step 4: Simplify right side
   259,785x = 291,576,240,484
5. Step 5: Solve for x
   x = 291,576,240,484/259,785
6. Step 6: Final answer
   x = 1,122,375.20