Finding the Fourth Proportional to 3,856.23, 5,321.60 and 2,087.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.23 : 5,321.60 = 2,087.83 : x
2. Step 2: Convert to fraction form
   3,856.23/5,321.60 = 2,087.83/x
3. Step 3: Cross multiply
   3,856.23x = 5,321.60 × 2,087.83
4. Step 4: Simplify right side
   3,856.23x = 11,110,585.69
5. Step 5: Solve for x
   x = 11,110,585.69/3,856.23
6. Step 6: Final answer
   x = 2,881.21