Finding the Third Proportional to 122,411.25 and 268,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,411.25 : 268,879.50 = 268,879.50 : x
2. Step 2: Convert to fraction form
   122,411.25/268,879.50 = 268,879.50/x
3. Step 3: Cross multiply
   122,411.25x = 268,879.50 × 268,879.50
4. Step 4: Simplify right side
   122,411.25x = 72,296,185,520.25
5. Step 5: Solve for x
   x = 72,296,185,520.25/122,411.25
6. Step 6: Final answer
   x = 590,600.83