Finding the Fourth Proportional to 13,144.35, 18,139.49 and 7,176.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.35 : 18,139.49 = 7,176.27 : x
2. Step 2: Convert to fraction form
   13,144.35/18,139.49 = 7,176.27/x
3. Step 3: Cross multiply
   13,144.35x = 18,139.49 × 7,176.27
4. Step 4: Simplify right side
   13,144.35x = 130,173,877.90
5. Step 5: Solve for x
   x = 130,173,877.90/13,144.35
6. Step 6: Final answer
   x = 9,903.41