Finding the Fourth Proportional to 16,450.10, 22,680.56 and 13,728.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,450.10 : 22,680.56 = 13,728.55 : x
2. Step 2: Convert to fraction form
   16,450.10/22,680.56 = 13,728.55/x
3. Step 3: Cross multiply
   16,450.10x = 22,680.56 × 13,728.55
4. Step 4: Simplify right side
   16,450.10x = 311,371,133.35
5. Step 5: Solve for x
   x = 311,371,133.35/16,450.10
6. Step 6: Final answer
   x = 18,928.23