Finding the Fourth Proportional to 2,803.41, 3,871.40 and 2,265.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,803.41 : 3,871.40 = 2,265.57 : x
2. Step 2: Convert to fraction form
   2,803.41/3,871.40 = 2,265.57/x
3. Step 3: Cross multiply
   2,803.41x = 3,871.40 × 2,265.57
4. Step 4: Simplify right side
   2,803.41x = 8,770,916.37
5. Step 5: Solve for x
   x = 8,770,916.37/2,803.41
6. Step 6: Final answer
   x = 3,128.66