Finding the Fourth Proportional to 12,072.70, 16,668.12 and 9,839.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.70 : 16,668.12 = 9,839.94 : x
2. Step 2: Convert to fraction form
   12,072.70/16,668.12 = 9,839.94/x
3. Step 3: Cross multiply
   12,072.70x = 16,668.12 × 9,839.94
4. Step 4: Simplify right side
   12,072.70x = 164,013,300.71
5. Step 5: Solve for x
   x = 164,013,300.71/12,072.70
6. Step 6: Final answer
   x = 13,585.47