Finding the Fourth Proportional to 18,111.75, 25,003.94 and 14,123.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,111.75 : 25,003.94 = 14,123.31 : x
2. Step 2: Convert to fraction form
   18,111.75/25,003.94 = 14,123.31/x
3. Step 3: Cross multiply
   18,111.75x = 25,003.94 × 14,123.31
4. Step 4: Simplify right side
   18,111.75x = 353,138,325.22
5. Step 5: Solve for x
   x = 353,138,325.22/18,111.75
6. Step 6: Final answer
   x = 19,497.75