Finding the Fourth Proportional to 16,386.26, 22,626.03 and 13,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,386.26 : 22,626.03 = 13,189.50 : x
2. Step 2: Convert to fraction form
   16,386.26/22,626.03 = 13,189.50/x
3. Step 3: Cross multiply
   16,386.26x = 22,626.03 × 13,189.50
4. Step 4: Simplify right side
   16,386.26x = 298,426,022.69
5. Step 5: Solve for x
   x = 298,426,022.69/16,386.26
6. Step 6: Final answer
   x = 18,211.96