Finding the Fourth Proportional to 21,603.78, 29,813.52 and 12,043.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,603.78 : 29,813.52 = 12,043.38 : x
2. Step 2: Convert to fraction form
   21,603.78/29,813.52 = 12,043.38/x
3. Step 3: Cross multiply
   21,603.78x = 29,813.52 × 12,043.38
4. Step 4: Simplify right side
   21,603.78x = 359,055,550.50
5. Step 5: Solve for x
   x = 359,055,550.50/21,603.78
6. Step 6: Final answer
   x = 16,620.03