Finding the Fourth Proportional to 2,860.50, 3,944.79 and 1,866.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.50 : 3,944.79 = 1,866.54 : x
2. Step 2: Convert to fraction form
   2,860.50/3,944.79 = 1,866.54/x
3. Step 3: Cross multiply
   2,860.50x = 3,944.79 × 1,866.54
4. Step 4: Simplify right side
   2,860.50x = 7,363,108.33
5. Step 5: Solve for x
   x = 7,363,108.33/2,860.50
6. Step 6: Final answer
   x = 2,574.06