Finding the Fourth Proportional to 9,987.14, 13,782.89 and 5,510.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.14 : 13,782.89 = 5,510.88 : x
2. Step 2: Convert to fraction form
   9,987.14/13,782.89 = 5,510.88/x
3. Step 3: Cross multiply
   9,987.14x = 13,782.89 × 5,510.88
4. Step 4: Simplify right side
   9,987.14x = 75,955,866.62
5. Step 5: Solve for x
   x = 75,955,866.62/9,987.14
6. Step 6: Final answer
   x = 7,605.37