Finding the Fourth Proportional to 16,239, 22,397.99 and 12,419.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,239 : 22,397.99 = 12,419.27 : x
2. Step 2: Convert to fraction form
   16,239/22,397.99 = 12,419.27/x
3. Step 3: Cross multiply
   16,239x = 22,397.99 × 12,419.27
4. Step 4: Simplify right side
   16,239x = 278,166,685.27
5. Step 5: Solve for x
   x = 278,166,685.27/16,239
6. Step 6: Final answer
   x = 17,129.55