Finding the Fourth Proportional to 5,707.56, 7,876.59 and 3,189.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,707.56 : 7,876.59 = 3,189.60 : x
2. Step 2: Convert to fraction form
   5,707.56/7,876.59 = 3,189.60/x
3. Step 3: Cross multiply
   5,707.56x = 7,876.59 × 3,189.60
4. Step 4: Simplify right side
   5,707.56x = 25,123,171.46
5. Step 5: Solve for x
   x = 25,123,171.46/5,707.56
6. Step 6: Final answer
   x = 4,401.74