Finding the Fourth Proportional to 14,141.78, 19,513.37 and 8,172.38

Step by Step Solution

1. Step 1: Write the proportion equation
   14,141.78 : 19,513.37 = 8,172.38 : x
2. Step 2: Convert to fraction form
   14,141.78/19,513.37 = 8,172.38/x
3. Step 3: Cross multiply
   14,141.78x = 19,513.37 × 8,172.38
4. Step 4: Simplify right side
   14,141.78x = 159,470,674.72
5. Step 5: Solve for x
   x = 159,470,674.72/14,141.78
6. Step 6: Final answer
   x = 11,276.56