Finding the Fourth Proportional to 13,142.24, 18,145.14 and 10,111.97

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.24 : 18,145.14 = 10,111.97 : x
2. Step 2: Convert to fraction form
   13,142.24/18,145.14 = 10,111.97/x
3. Step 3: Cross multiply
   13,142.24x = 18,145.14 × 10,111.97
4. Step 4: Simplify right side
   13,142.24x = 183,483,111.33
5. Step 5: Solve for x
   x = 183,483,111.33/13,142.24
6. Step 6: Final answer
   x = 13,961.33