Finding the Fourth Proportional to 13,144.56, 18,139.39 and 7,176.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.56 : 18,139.39 = 7,176.22 : x
2. Step 2: Convert to fraction form
   13,144.56/18,139.39 = 7,176.22/x
3. Step 3: Cross multiply
   13,144.56x = 18,139.39 × 7,176.22
4. Step 4: Simplify right side
   13,144.56x = 130,172,253.31
5. Step 5: Solve for x
   x = 130,172,253.31/13,144.56
6. Step 6: Final answer
   x = 9,903.13