Finding the Fourth Proportional to 9,987.33, 13,782.96 and 5,511.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.33 : 13,782.96 = 5,511.09 : x
2. Step 2: Convert to fraction form
   9,987.33/13,782.96 = 5,511.09/x
3. Step 3: Cross multiply
   9,987.33x = 13,782.96 × 5,511.09
4. Step 4: Simplify right side
   9,987.33x = 75,959,133.03
5. Step 5: Solve for x
   x = 75,959,133.03/9,987.33
6. Step 6: Final answer
   x = 7,605.55