Finding the Fourth Proportional to 5,481.89, 8,179.45 and 5,355.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,481.89 : 8,179.45 = 5,355.83 : x
2. Step 2: Convert to fraction form
   5,481.89/8,179.45 = 5,355.83/x
3. Step 3: Cross multiply
   5,481.89x = 8,179.45 × 5,355.83
4. Step 4: Simplify right side
   5,481.89x = 43,807,743.69
5. Step 5: Solve for x
   x = 43,807,743.69/5,481.89
6. Step 6: Final answer
   x = 7,991.36