Finding the Fourth Proportional to 13,111.95, 18,094.92 and 7,144.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.95 : 18,094.92 = 7,144.18 : x
2. Step 2: Convert to fraction form
   13,111.95/18,094.92 = 7,144.18/x
3. Step 3: Cross multiply
   13,111.95x = 18,094.92 × 7,144.18
4. Step 4: Simplify right side
   13,111.95x = 129,273,365.57
5. Step 5: Solve for x
   x = 129,273,365.57/13,111.95
6. Step 6: Final answer
   x = 9,859.20