Finding the Third Proportional to 258,522.75 and 558,550.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,522.75 : 558,550.50 = 558,550.50 : x
2. Step 2: Convert to fraction form
   258,522.75/558,550.50 = 558,550.50/x
3. Step 3: Cross multiply
   258,522.75x = 558,550.50 × 558,550.50
4. Step 4: Simplify right side
   258,522.75x = 311,978,661,050.25
5. Step 5: Solve for x
   x = 311,978,661,050.25/258,522.75
6. Step 6: Final answer
   x = 1,206,774.49