Finding the Fourth Proportional to 5,707.56, 7,876.42 and 3,189.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,707.56 : 7,876.42 = 3,189.67 : x
2. Step 2: Convert to fraction form
   5,707.56/7,876.42 = 3,189.67/x
3. Step 3: Cross multiply
   5,707.56x = 7,876.42 × 3,189.67
4. Step 4: Simplify right side
   5,707.56x = 25,123,180.58
5. Step 5: Solve for x
   x = 25,123,180.58/5,707.56
6. Step 6: Final answer
   x = 4,401.74