Finding the Fourth Proportional to 9,987.37, 13,782.56 and 5,511.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.37 : 13,782.56 = 5,511.12 : x
2. Step 2: Convert to fraction form
   9,987.37/13,782.56 = 5,511.12/x
3. Step 3: Cross multiply
   9,987.37x = 13,782.56 × 5,511.12
4. Step 4: Simplify right side
   9,987.37x = 75,957,342.07
5. Step 5: Solve for x
   x = 75,957,342.07/9,987.37
6. Step 6: Final answer
   x = 7,605.34