Finding the Fourth Proportional to 3,806.55, 5,711.94 and 1,858.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,806.55 : 5,711.94 = 1,858.77 : x
2. Step 2: Convert to fraction form
   3,806.55/5,711.94 = 1,858.77/x
3. Step 3: Cross multiply
   3,806.55x = 5,711.94 × 1,858.77
4. Step 4: Simplify right side
   3,806.55x = 10,617,182.71
5. Step 5: Solve for x
   x = 10,617,182.71/3,806.55
6. Step 6: Final answer
   x = 2,789.19