Finding the Fourth Proportional to 9,986.49, 13,781.62 and 5,510.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.49 : 13,781.62 = 5,510.30 : x
2. Step 2: Convert to fraction form
   9,986.49/13,781.62 = 5,510.30/x
3. Step 3: Cross multiply
   9,986.49x = 13,781.62 × 5,510.30
4. Step 4: Simplify right side
   9,986.49x = 75,940,860.69
5. Step 5: Solve for x
   x = 75,940,860.69/9,986.49
6. Step 6: Final answer
   x = 7,604.36