Finding the Fourth Proportional to 9,960.42, 13,743.79 and 5,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,960.42 : 13,743.79 = 5,710.72 : x
2. Step 2: Convert to fraction form
   9,960.42/13,743.79 = 5,710.72/x
3. Step 3: Cross multiply
   9,960.42x = 13,743.79 × 5,710.72
4. Step 4: Simplify right side
   9,960.42x = 78,486,936.43
5. Step 5: Solve for x
   x = 78,486,936.43/9,960.42
6. Step 6: Final answer
   x = 7,879.88