Finding the Fourth Proportional to 16,680.98, 23,039.98 and 13,190.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.98 : 23,039.98 = 13,190.42 : x
2. Step 2: Convert to fraction form
   16,680.98/23,039.98 = 13,190.42/x
3. Step 3: Cross multiply
   16,680.98x = 23,039.98 × 13,190.42
4. Step 4: Simplify right side
   16,680.98x = 303,907,012.99
5. Step 5: Solve for x
   x = 303,907,012.99/16,680.98
6. Step 6: Final answer
   x = 18,218.77