Finding the Fourth Proportional to 9,989.48, 13,785.38 and 5,513.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.48 : 13,785.38 = 5,513.27 : x
2. Step 2: Convert to fraction form
   9,989.48/13,785.38 = 5,513.27/x
3. Step 3: Cross multiply
   9,989.48x = 13,785.38 × 5,513.27
4. Step 4: Simplify right side
   9,989.48x = 76,002,425.50
5. Step 5: Solve for x
   x = 76,002,425.50/9,989.48
6. Step 6: Final answer
   x = 7,608.25