Finding the Fourth Proportional to 185,067.31, 277,559.46 and 85,131.55

Step by Step Solution

1. Step 1: Write the proportion equation
   185,067.31 : 277,559.46 = 85,131.55 : x
2. Step 2: Convert to fraction form
   185,067.31/277,559.46 = 85,131.55/x
3. Step 3: Cross multiply
   185,067.31x = 277,559.46 × 85,131.55
4. Step 4: Simplify right side
   185,067.31x = 23,629,067,046.96
5. Step 5: Solve for x
   x = 23,629,067,046.96/185,067.31
6. Step 6: Final answer
   x = 127,678.23