Finding the Fourth Proportional to 13,144.83, 18,139.80 and 7,176.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.83 : 18,139.80 = 7,176.49 : x
2. Step 2: Convert to fraction form
   13,144.83/18,139.80 = 7,176.49/x
3. Step 3: Cross multiply
   13,144.83x = 18,139.80 × 7,176.49
4. Step 4: Simplify right side
   13,144.83x = 130,180,093.30
5. Step 5: Solve for x
   x = 130,180,093.30/13,144.83
6. Step 6: Final answer
   x = 9,903.52