Finding the Fourth Proportional to 9,987.82, 13,782.98 and 5,511.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.82 : 13,782.98 = 5,511.30 : x
2. Step 2: Convert to fraction form
   9,987.82/13,782.98 = 5,511.30/x
3. Step 3: Cross multiply
   9,987.82x = 13,782.98 × 5,511.30
4. Step 4: Simplify right side
   9,987.82x = 75,962,137.67
5. Step 5: Solve for x
   x = 75,962,137.67/9,987.82
6. Step 6: Final answer
   x = 7,605.48