Finding the Fourth Proportional to 259,501.88, 389,309.28 and 79,587.38

Step by Step Solution

1. Step 1: Write the proportion equation
   259,501.88 : 389,309.28 = 79,587.38 : x
2. Step 2: Convert to fraction form
   259,501.88/389,309.28 = 79,587.38/x
3. Step 3: Cross multiply
   259,501.88x = 389,309.28 × 79,587.38
4. Step 4: Simplify right side
   259,501.88x = 30,984,105,604.89
5. Step 5: Solve for x
   x = 30,984,105,604.89/259,501.88
6. Step 6: Final answer
   x = 119,398.39