Finding the Fourth Proportional to 9,987.94, 13,782.56 and 5,511.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.94 : 13,782.56 = 5,511.08 : x
2. Step 2: Convert to fraction form
   9,987.94/13,782.56 = 5,511.08/x
3. Step 3: Cross multiply
   9,987.94x = 13,782.56 × 5,511.08
4. Step 4: Simplify right side
   9,987.94x = 75,956,797.67
5. Step 5: Solve for x
   x = 75,956,797.67/9,987.94
6. Step 6: Final answer
   x = 7,604.85