Finding the Fourth Proportional to 9,987.27, 13,782.09 and 5,510.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.27 : 13,782.09 = 5,510.91 : x
2. Step 2: Convert to fraction form
   9,987.27/13,782.09 = 5,510.91/x
3. Step 3: Cross multiply
   9,987.27x = 13,782.09 × 5,510.91
4. Step 4: Simplify right side
   9,987.27x = 75,951,875.69
5. Step 5: Solve for x
   x = 75,951,875.69/9,987.27
6. Step 6: Final answer
   x = 7,604.86