Finding the Fourth Proportional to 9,986.82, 13,781.60 and 5,510.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.82 : 13,781.60 = 5,510.30 : x
2. Step 2: Convert to fraction form
   9,986.82/13,781.60 = 5,510.30/x
3. Step 3: Cross multiply
   9,986.82x = 13,781.60 × 5,510.30
4. Step 4: Simplify right side
   9,986.82x = 75,940,681.57
5. Step 5: Solve for x
   x = 75,940,681.57/9,986.82
6. Step 6: Final answer
   x = 7,604.09