Finding the Fourth Proportional to 6,939.20, 9,570.72 and 4,141.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,939.20 : 9,570.72 = 4,141.76 : x
2. Step 2: Convert to fraction form
   6,939.20/9,570.72 = 4,141.76/x
3. Step 3: Cross multiply
   6,939.20x = 9,570.72 × 4,141.76
4. Step 4: Simplify right side
   6,939.20x = 39,639,625.27
5. Step 5: Solve for x
   x = 39,639,625.27/6,939.20
6. Step 6: Final answer
   x = 5,712.42