Finding the Fourth Proportional to 3,456.82, 4,771.31 and 2,131.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.82 : 4,771.31 = 2,131.61 : x
2. Step 2: Convert to fraction form
   3,456.82/4,771.31 = 2,131.61/x
3. Step 3: Cross multiply
   3,456.82x = 4,771.31 × 2,131.61
4. Step 4: Simplify right side
   3,456.82x = 10,170,572.11
5. Step 5: Solve for x
   x = 10,170,572.11/3,456.82
6. Step 6: Final answer
   x = 2,942.18