Finding the Fourth Proportional to 13,144.56, 18,139.50 and 7,176.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.56 : 18,139.50 = 7,176.12 : x
2. Step 2: Convert to fraction form
   13,144.56/18,139.50 = 7,176.12/x
3. Step 3: Cross multiply
   13,144.56x = 18,139.50 × 7,176.12
4. Step 4: Simplify right side
   13,144.56x = 130,171,228.74
5. Step 5: Solve for x
   x = 130,171,228.74/13,144.56
6. Step 6: Final answer
   x = 9,903.05