Finding the Fourth Proportional to 3,856.22, 5,321.60 and 2,087.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.22 : 5,321.60 = 2,087.82 : x
2. Step 2: Convert to fraction form
   3,856.22/5,321.60 = 2,087.82/x
3. Step 3: Cross multiply
   3,856.22x = 5,321.60 × 2,087.82
4. Step 4: Simplify right side
   3,856.22x = 11,110,532.47
5. Step 5: Solve for x
   x = 11,110,532.47/3,856.22
6. Step 6: Final answer
   x = 2,881.20