Finding the Third Proportional to 259,380 and 557,512.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,380 : 557,512.50 = 557,512.50 : x
2. Step 2: Convert to fraction form
   259,380/557,512.50 = 557,512.50/x
3. Step 3: Cross multiply
   259,380x = 557,512.50 × 557,512.50
4. Step 4: Simplify right side
   259,380x = 310,820,187,656.25
5. Step 5: Solve for x
   x = 310,820,187,656.25/259,380
6. Step 6: Final answer
   x = 1,198,319.79