Finding the Fourth Proportional to 21,667.85, 29,901.07 and 12,107.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.85 : 29,901.07 = 12,107.82 : x
2. Step 2: Convert to fraction form
   21,667.85/29,901.07 = 12,107.82/x
3. Step 3: Cross multiply
   21,667.85x = 29,901.07 × 12,107.82
4. Step 4: Simplify right side
   21,667.85x = 362,036,743.10
5. Step 5: Solve for x
   x = 362,036,743.10/21,667.85
6. Step 6: Final answer
   x = 16,708.47