Finding the Fourth Proportional to 9,987.48, 13,782.61 and 5,511.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.48 : 13,782.61 = 5,511.27 : x
2. Step 2: Convert to fraction form
   9,987.48/13,782.61 = 5,511.27/x
3. Step 3: Cross multiply
   9,987.48x = 13,782.61 × 5,511.27
4. Step 4: Simplify right side
   9,987.48x = 75,959,685.01
5. Step 5: Solve for x
   x = 75,959,685.01/9,987.48
6. Step 6: Final answer
   x = 7,605.49