Finding the Fourth Proportional to 9,986.53, 13,781.46 and 5,510.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.53 : 13,781.46 = 5,510.28 : x
2. Step 2: Convert to fraction form
   9,986.53/13,781.46 = 5,510.28/x
3. Step 3: Cross multiply
   9,986.53x = 13,781.46 × 5,510.28
4. Step 4: Simplify right side
   9,986.53x = 75,939,675.86
5. Step 5: Solve for x
   x = 75,939,675.86/9,986.53
6. Step 6: Final answer
   x = 7,604.21