Finding the Fourth Proportional to 13,111.41, 18,093.96 and 7,143.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.41 : 18,093.96 = 7,143.33 : x
2. Step 2: Convert to fraction form
   13,111.41/18,093.96 = 7,143.33/x
3. Step 3: Cross multiply
   13,111.41x = 18,093.96 × 7,143.33
4. Step 4: Simplify right side
   13,111.41x = 129,251,127.29
5. Step 5: Solve for x
   x = 129,251,127.29/13,111.41
6. Step 6: Final answer
   x = 9,857.91