Finding the Fourth Proportional to 9,663.39, 13,337.37 and 5,687.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.39 : 13,337.37 = 5,687.91 : x
2. Step 2: Convert to fraction form
   9,663.39/13,337.37 = 5,687.91/x
3. Step 3: Cross multiply
   9,663.39x = 13,337.37 × 5,687.91
4. Step 4: Simplify right side
   9,663.39x = 75,861,760.20
5. Step 5: Solve for x
   x = 75,861,760.20/9,663.39
6. Step 6: Final answer
   x = 7,850.43