Finding the Fourth Proportional to 3,856.01, 5,321.30 and 2,087.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.01 : 5,321.30 = 2,087.62 : x
2. Step 2: Convert to fraction form
   3,856.01/5,321.30 = 2,087.62/x
3. Step 3: Cross multiply
   3,856.01x = 5,321.30 × 2,087.62
4. Step 4: Simplify right side
   3,856.01x = 11,108,852.31
5. Step 5: Solve for x
   x = 11,108,852.31/3,856.01
6. Step 6: Final answer
   x = 2,880.92