Finding the Fourth Proportional to 21,469.89, 29,628.69 and 12,038.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,469.89 : 29,628.69 = 12,038.25 : x
2. Step 2: Convert to fraction form
   21,469.89/29,628.69 = 12,038.25/x
3. Step 3: Cross multiply
   21,469.89x = 29,628.69 × 12,038.25
4. Step 4: Simplify right side
   21,469.89x = 356,677,577.39
5. Step 5: Solve for x
   x = 356,677,577.39/21,469.89
6. Step 6: Final answer
   x = 16,612.92