Finding the Fourth Proportional to 19,667.61, 27,139.28 and 11,052.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.61 : 27,139.28 = 11,052.42 : x
2. Step 2: Convert to fraction form
   19,667.61/27,139.28 = 11,052.42/x
3. Step 3: Cross multiply
   19,667.61x = 27,139.28 × 11,052.42
4. Step 4: Simplify right side
   19,667.61x = 299,954,665.80
5. Step 5: Solve for x
   x = 299,954,665.80/19,667.61
6. Step 6: Final answer
   x = 15,251.20