Finding the Fourth Proportional to 1,806.89, 2,711.41 and 1,257.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.89 : 2,711.41 = 1,257.98 : x
2. Step 2: Convert to fraction form
   1,806.89/2,711.41 = 1,257.98/x
3. Step 3: Cross multiply
   1,806.89x = 2,711.41 × 1,257.98
4. Step 4: Simplify right side
   1,806.89x = 3,410,882.85
5. Step 5: Solve for x
   x = 3,410,882.85/1,806.89
6. Step 6: Final answer
   x = 1,887.71