Finding the Fourth Proportional to 9,987.28, 13,782.48 and 5,510.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.28 : 13,782.48 = 5,510.81 : x
2. Step 2: Convert to fraction form
   9,987.28/13,782.48 = 5,510.81/x
3. Step 3: Cross multiply
   9,987.28x = 13,782.48 × 5,510.81
4. Step 4: Simplify right side
   9,987.28x = 75,952,628.61
5. Step 5: Solve for x
   x = 75,952,628.61/9,987.28
6. Step 6: Final answer
   x = 7,604.94