Finding the Fourth Proportional to 339,242.37, 508,505.34 and 259,105.82

Step by Step Solution

1. Step 1: Write the proportion equation
   339,242.37 : 508,505.34 = 259,105.82 : x
2. Step 2: Convert to fraction form
   339,242.37/508,505.34 = 259,105.82/x
3. Step 3: Cross multiply
   339,242.37x = 508,505.34 × 259,105.82
4. Step 4: Simplify right side
   339,242.37x = 131,756,690,066.73
5. Step 5: Solve for x
   x = 131,756,690,066.73/339,242.37
6. Step 6: Final answer
   x = 388,385.13