Finding the Fourth Proportional to 3,866.37, 5,806.71 and 2,018.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.37 : 5,806.71 = 2,018.76 : x
2. Step 2: Convert to fraction form
   3,866.37/5,806.71 = 2,018.76/x
3. Step 3: Cross multiply
   3,866.37x = 5,806.71 × 2,018.76
4. Step 4: Simplify right side
   3,866.37x = 11,722,353.88
5. Step 5: Solve for x
   x = 11,722,353.88/3,866.37
6. Step 6: Final answer
   x = 3,031.88