Finding the Fourth Proportional to 16,679.98, 23,038.59 and 13,189.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,679.98 : 23,038.59 = 13,189.42 : x
2. Step 2: Convert to fraction form
   16,679.98/23,038.59 = 13,189.42/x
3. Step 3: Cross multiply
   16,679.98x = 23,038.59 × 13,189.42
4. Step 4: Simplify right side
   16,679.98x = 303,865,639.72
5. Step 5: Solve for x
   x = 303,865,639.72/16,679.98
6. Step 6: Final answer
   x = 18,217.39