Finding the Fourth Proportional to 3,897.82, 5,383.56 and 3,581.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,897.82 : 5,383.56 = 3,581.92 : x
2. Step 2: Convert to fraction form
   3,897.82/5,383.56 = 3,581.92/x
3. Step 3: Cross multiply
   3,897.82x = 5,383.56 × 3,581.92
4. Step 4: Simplify right side
   3,897.82x = 19,283,481.24
5. Step 5: Solve for x
   x = 19,283,481.24/3,897.82
6. Step 6: Final answer
   x = 4,947.25