Finding the Fourth Proportional to 21,852.03, 30,155.52 and 12,419.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,852.03 : 30,155.52 = 12,419.97 : x
2. Step 2: Convert to fraction form
   21,852.03/30,155.52 = 12,419.97/x
3. Step 3: Cross multiply
   21,852.03x = 30,155.52 × 12,419.97
4. Step 4: Simplify right side
   21,852.03x = 374,530,653.73
5. Step 5: Solve for x
   x = 374,530,653.73/21,852.03
6. Step 6: Final answer
   x = 17,139.40