Finding the Fourth Proportional to 19,109, 28,648.42 and 12,074.19

Step by Step Solution

1. Step 1: Write the proportion equation
   19,109 : 28,648.42 = 12,074.19 : x
2. Step 2: Convert to fraction form
   19,109/28,648.42 = 12,074.19/x
3. Step 3: Cross multiply
   19,109x = 28,648.42 × 12,074.19
4. Step 4: Simplify right side
   19,109x = 345,906,466.28
5. Step 5: Solve for x
   x = 345,906,466.28/19,109
6. Step 6: Final answer
   x = 18,101.76