Finding the Fourth Proportional to 3,859.83, 5,326.25 and 2,181.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.83 : 5,326.25 = 2,181.15 : x
2. Step 2: Convert to fraction form
   3,859.83/5,326.25 = 2,181.15/x
3. Step 3: Cross multiply
   3,859.83x = 5,326.25 × 2,181.15
4. Step 4: Simplify right side
   3,859.83x = 11,617,339.28
5. Step 5: Solve for x
   x = 11,617,339.28/3,859.83
6. Step 6: Final answer
   x = 3,009.81