Finding the Third Proportional to 245,605 and 515,978

Step by Step Solution

1. Step 1: Write the proportion equation
   245,605 : 515,978 = 515,978 : x
2. Step 2: Convert to fraction form
   245,605/515,978 = 515,978/x
3. Step 3: Cross multiply
   245,605x = 515,978 × 515,978
4. Step 4: Simplify right side
   245,605x = 266,233,296,484
5. Step 5: Solve for x
   x = 266,233,296,484/245,605
6. Step 6: Final answer
   x = 1,083,989.73