Finding the Fourth Proportional to 13,499.53, 18,615.22 and 11,617.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.53 : 18,615.22 = 11,617.49 : x
2. Step 2: Convert to fraction form
   13,499.53/18,615.22 = 11,617.49/x
3. Step 3: Cross multiply
   13,499.53x = 18,615.22 × 11,617.49
4. Step 4: Simplify right side
   13,499.53x = 216,262,149.69
5. Step 5: Solve for x
   x = 216,262,149.69/13,499.53
6. Step 6: Final answer
   x = 16,019.98