Finding the Fourth Proportional to 259,881.69, 389,836.49 and 82,402.54

Step by Step Solution

1. Step 1: Write the proportion equation
   259,881.69 : 389,836.49 = 82,402.54 : x
2. Step 2: Convert to fraction form
   259,881.69/389,836.49 = 82,402.54/x
3. Step 3: Cross multiply
   259,881.69x = 389,836.49 × 82,402.54
4. Step 4: Simplify right side
   259,881.69x = 32,123,515,574.08
5. Step 5: Solve for x
   x = 32,123,515,574.08/259,881.69
6. Step 6: Final answer
   x = 123,608.23