Finding the Fourth Proportional to 19,871.56, 27,423.46 and 10,919.37

Step by Step Solution

1. Step 1: Write the proportion equation
   19,871.56 : 27,423.46 = 10,919.37 : x
2. Step 2: Convert to fraction form
   19,871.56/27,423.46 = 10,919.37/x
3. Step 3: Cross multiply
   19,871.56x = 27,423.46 × 10,919.37
4. Step 4: Simplify right side
   19,871.56x = 299,446,906.42
5. Step 5: Solve for x
   x = 299,446,906.42/19,871.56
6. Step 6: Final answer
   x = 15,069.12