Finding the Fourth Proportional to 21,617.27, 29,838.49 and 12,667.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,617.27 : 29,838.49 = 12,667.68 : x
2. Step 2: Convert to fraction form
   21,617.27/29,838.49 = 12,667.68/x
3. Step 3: Cross multiply
   21,617.27x = 29,838.49 × 12,667.68
4. Step 4: Simplify right side
   21,617.27x = 377,984,443.00
5. Step 5: Solve for x
   x = 377,984,443.00/21,617.27
6. Step 6: Final answer
   x = 17,485.30