Finding the Fourth Proportional to 3,900.04, 5,381.86 and 2,856.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.04 : 5,381.86 = 2,856.52 : x
2. Step 2: Convert to fraction form
   3,900.04/5,381.86 = 2,856.52/x
3. Step 3: Cross multiply
   3,900.04x = 5,381.86 × 2,856.52
4. Step 4: Simplify right side
   3,900.04x = 15,373,390.73
5. Step 5: Solve for x
   x = 15,373,390.73/3,900.04
6. Step 6: Final answer
   x = 3,941.85