Finding the Fourth Proportional to 11,008.76, 16,503.27 and 3,987.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,008.76 : 16,503.27 = 3,987.11 : x
2. Step 2: Convert to fraction form
   11,008.76/16,503.27 = 3,987.11/x
3. Step 3: Cross multiply
   11,008.76x = 16,503.27 × 3,987.11
4. Step 4: Simplify right side
   11,008.76x = 65,800,270.33
5. Step 5: Solve for x
   x = 65,800,270.33/11,008.76
6. Step 6: Final answer
   x = 5,977.09