Finding the Fourth Proportional to 13,857.71, 19,112.83 and 12,266.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,857.71 : 19,112.83 = 12,266.06 : x
2. Step 2: Convert to fraction form
   13,857.71/19,112.83 = 12,266.06/x
3. Step 3: Cross multiply
   13,857.71x = 19,112.83 × 12,266.06
4. Step 4: Simplify right side
   13,857.71x = 234,438,993.32
5. Step 5: Solve for x
   x = 234,438,993.32/13,857.71
6. Step 6: Final answer
   x = 16,917.59