Finding the Fourth Proportional to 3,939.82, 5,437.46 and 2,261.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.82 : 5,437.46 = 2,261.50 : x
2. Step 2: Convert to fraction form
   3,939.82/5,437.46 = 2,261.50/x
3. Step 3: Cross multiply
   3,939.82x = 5,437.46 × 2,261.50
4. Step 4: Simplify right side
   3,939.82x = 12,296,815.79
5. Step 5: Solve for x
   x = 12,296,815.79/3,939.82
6. Step 6: Final answer
   x = 3,121.16