Finding the Fourth Proportional to 14,400.56, 19,871.24 and 8,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,400.56 : 19,871.24 = 8,111.72 : x
2. Step 2: Convert to fraction form
   14,400.56/19,871.24 = 8,111.72/x
3. Step 3: Cross multiply
   14,400.56x = 19,871.24 × 8,111.72
4. Step 4: Simplify right side
   14,400.56x = 161,189,934.93
5. Step 5: Solve for x
   x = 161,189,934.93/14,400.56
6. Step 6: Final answer
   x = 11,193.31