Finding the Fourth Proportional to 19,856.88, 27,401.42 and 10,905.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,856.88 : 27,401.42 = 10,905.56 : x
2. Step 2: Convert to fraction form
   19,856.88/27,401.42 = 10,905.56/x
3. Step 3: Cross multiply
   19,856.88x = 27,401.42 × 10,905.56
4. Step 4: Simplify right side
   19,856.88x = 298,827,829.90
5. Step 5: Solve for x
   x = 298,827,829.90/19,856.88
6. Step 6: Final answer
   x = 15,049.08