Finding the Fourth Proportional to 5,390.12, 8,081.15 and 3,719.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390.12 : 8,081.15 = 3,719.48 : x
2. Step 2: Convert to fraction form
   5,390.12/8,081.15 = 3,719.48/x
3. Step 3: Cross multiply
   5,390.12x = 8,081.15 × 3,719.48
4. Step 4: Simplify right side
   5,390.12x = 30,057,635.40
5. Step 5: Solve for x
   x = 30,057,635.40/5,390.12
6. Step 6: Final answer
   x = 5,576.43