Finding the Third Proportional to 259,118 and 557,980

Step by Step Solution

1. Step 1: Write the proportion equation
   259,118 : 557,980 = 557,980 : x
2. Step 2: Convert to fraction form
   259,118/557,980 = 557,980/x
3. Step 3: Cross multiply
   259,118x = 557,980 × 557,980
4. Step 4: Simplify right side
   259,118x = 311,341,680,400
5. Step 5: Solve for x
   x = 311,341,680,400/259,118
6. Step 6: Final answer
   x = 1,201,544.01