Finding the Fourth Proportional to 3,902.89, 5,856.78 and 2,260.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,902.89 : 5,856.78 = 2,260.21 : x
2. Step 2: Convert to fraction form
   3,902.89/5,856.78 = 2,260.21/x
3. Step 3: Cross multiply
   3,902.89x = 5,856.78 × 2,260.21
4. Step 4: Simplify right side
   3,902.89x = 13,237,552.72
5. Step 5: Solve for x
   x = 13,237,552.72/3,902.89
6. Step 6: Final answer
   x = 3,391.73