Finding the Fourth Proportional to 5,419.89, 7,481.21 and 3,181.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.89 : 7,481.21 = 3,181.71 : x
2. Step 2: Convert to fraction form
   5,419.89/7,481.21 = 3,181.71/x
3. Step 3: Cross multiply
   5,419.89x = 7,481.21 × 3,181.71
4. Step 4: Simplify right side
   5,419.89x = 23,803,007.59
5. Step 5: Solve for x
   x = 23,803,007.59/5,419.89
6. Step 6: Final answer
   x = 4,391.79