Finding the Fourth Proportional to 9,989.44, 13,786.27 and 5,513.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.44 : 13,786.27 = 5,513.62 : x
2. Step 2: Convert to fraction form
   9,989.44/13,786.27 = 5,513.62/x
3. Step 3: Cross multiply
   9,989.44x = 13,786.27 × 5,513.62
4. Step 4: Simplify right side
   9,989.44x = 76,012,254.00
5. Step 5: Solve for x
   x = 76,012,254.00/9,989.44
6. Step 6: Final answer
   x = 7,609.26