Finding the Fourth Proportional to 258,072.60, 387,108.72 and 80,594.82

Step by Step Solution

1. Step 1: Write the proportion equation
   258,072.60 : 387,108.72 = 80,594.82 : x
2. Step 2: Convert to fraction form
   258,072.60/387,108.72 = 80,594.82/x
3. Step 3: Cross multiply
   258,072.60x = 387,108.72 × 80,594.82
4. Step 4: Simplify right side
   258,072.60x = 31,198,957,608.83
5. Step 5: Solve for x
   x = 31,198,957,608.83/258,072.60
6. Step 6: Final answer
   x = 120,892.17