Finding the Fourth Proportional to 9,986.43, 13,786.56 and 7,743.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.43 : 13,786.56 = 7,743.27 : x
2. Step 2: Convert to fraction form
   9,986.43/13,786.56 = 7,743.27/x
3. Step 3: Cross multiply
   9,986.43x = 13,786.56 × 7,743.27
4. Step 4: Simplify right side
   9,986.43x = 106,753,056.45
5. Step 5: Solve for x
   x = 106,753,056.45/9,986.43
6. Step 6: Final answer
   x = 10,689.81