Finding the Fourth Proportional to 13,144.46, 18,139.41 and 7,176.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.46 : 18,139.41 = 7,176.15 : x
2. Step 2: Convert to fraction form
   13,144.46/18,139.41 = 7,176.15/x
3. Step 3: Cross multiply
   13,144.46x = 18,139.41 × 7,176.15
4. Step 4: Simplify right side
   13,144.46x = 130,171,127.07
5. Step 5: Solve for x
   x = 130,171,127.07/13,144.46
6. Step 6: Final answer
   x = 9,903.12