Finding the Fourth Proportional to 3,859, 5,327.98 and 2,389.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859 : 5,327.98 = 2,389.56 : x
2. Step 2: Convert to fraction form
   3,859/5,327.98 = 2,389.56/x
3. Step 3: Cross multiply
   3,859x = 5,327.98 × 2,389.56
4. Step 4: Simplify right side
   3,859x = 12,731,527.89
5. Step 5: Solve for x
   x = 12,731,527.89/3,859
6. Step 6: Final answer
   x = 3,299.18