Finding the Fourth Proportional to 21,441, 29,588.58 and 12,009.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,441 : 29,588.58 = 12,009.54 : x
2. Step 2: Convert to fraction form
   21,441/29,588.58 = 12,009.54/x
3. Step 3: Cross multiply
   21,441x = 29,588.58 × 12,009.54
4. Step 4: Simplify right side
   21,441x = 355,345,235.05
5. Step 5: Solve for x
   x = 355,345,235.05/21,441
6. Step 6: Final answer
   x = 16,573.17