Finding the Fourth Proportional to 2,576.81, 3,554.39 and 2,261.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.81 : 3,554.39 = 2,261.82 : x
2. Step 2: Convert to fraction form
   2,576.81/3,554.39 = 2,261.82/x
3. Step 3: Cross multiply
   2,576.81x = 3,554.39 × 2,261.82
4. Step 4: Simplify right side
   2,576.81x = 8,039,396.04
5. Step 5: Solve for x
   x = 8,039,396.04/2,576.81
6. Step 6: Final answer
   x = 3,119.91