Finding the Third Proportional to 122,401.13 and 259,498.69

Step by Step Solution

1. Step 1: Write the proportion equation
   122,401.13 : 259,498.69 = 259,498.69 : x
2. Step 2: Convert to fraction form
   122,401.13/259,498.69 = 259,498.69/x
3. Step 3: Cross multiply
   122,401.13x = 259,498.69 × 259,498.69
4. Step 4: Simplify right side
   122,401.13x = 67,339,568,814.22
5. Step 5: Solve for x
   x = 67,339,568,814.22/122,401.13
6. Step 6: Final answer
   x = 550,154.82