Finding the Fourth Proportional to 5,811.34, 8,019.62 and 3,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,811.34 : 8,019.62 = 3,158.72 : x
2. Step 2: Convert to fraction form
   5,811.34/8,019.62 = 3,158.72/x
3. Step 3: Cross multiply
   5,811.34x = 8,019.62 × 3,158.72
4. Step 4: Simplify right side
   5,811.34x = 25,331,734.09
5. Step 5: Solve for x
   x = 25,331,734.09/5,811.34
6. Step 6: Final answer
   x = 4,359.02