Finding the Fourth Proportional to 259,800, 389,711.34 and 82,320.09

Step by Step Solution

1. Step 1: Write the proportion equation
   259,800 : 389,711.34 = 82,320.09 : x
2. Step 2: Convert to fraction form
   259,800/389,711.34 = 82,320.09/x
3. Step 3: Cross multiply
   259,800x = 389,711.34 × 82,320.09
4. Step 4: Simplify right side
   259,800x = 32,081,072,582.82
5. Step 5: Solve for x
   x = 32,081,072,582.82/259,800
6. Step 6: Final answer
   x = 123,483.73