Finding the Fourth Proportional to 11,086.72, 16,631.97 and 3,689.26

Step by Step Solution

1. Step 1: Write the proportion equation
   11,086.72 : 16,631.97 = 3,689.26 : x
2. Step 2: Convert to fraction form
   11,086.72/16,631.97 = 3,689.26/x
3. Step 3: Cross multiply
   11,086.72x = 16,631.97 × 3,689.26
4. Step 4: Simplify right side
   11,086.72x = 61,359,661.64
5. Step 5: Solve for x
   x = 61,359,661.64/11,086.72
6. Step 6: Final answer
   x = 5,534.52