Finding the Fourth Proportional to 12,464.45, 18,623.69 and 12,028.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,464.45 : 18,623.69 = 12,028.42 : x
2. Step 2: Convert to fraction form
   12,464.45/18,623.69 = 12,028.42/x
3. Step 3: Cross multiply
   12,464.45x = 18,623.69 × 12,028.42
4. Step 4: Simplify right side
   12,464.45x = 224,013,565.27
5. Step 5: Solve for x
   x = 224,013,565.27/12,464.45
6. Step 6: Final answer
   x = 17,972.20