Finding the Fourth Proportional to 21,684.65, 29,934.54 and 12,732.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,684.65 : 29,934.54 = 12,732.71 : x
2. Step 2: Convert to fraction form
   21,684.65/29,934.54 = 12,732.71/x
3. Step 3: Cross multiply
   21,684.65x = 29,934.54 × 12,732.71
4. Step 4: Simplify right side
   21,684.65x = 381,147,667.13
5. Step 5: Solve for x
   x = 381,147,667.13/21,684.65
6. Step 6: Final answer
   x = 17,576.85