Finding the Fourth Proportional to 11,005.07, 16,508.88 and 3,988.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005.07 : 16,508.88 = 3,988.38 : x
2. Step 2: Convert to fraction form
   11,005.07/16,508.88 = 3,988.38/x
3. Step 3: Cross multiply
   11,005.07x = 16,508.88 × 3,988.38
4. Step 4: Simplify right side
   11,005.07x = 65,843,748.72
5. Step 5: Solve for x
   x = 65,843,748.72/11,005.07
6. Step 6: Final answer
   x = 5,983.04