Finding the Fourth Proportional to 12,179.52, 16,811.34 and 7,144.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.52 : 16,811.34 = 7,144.80 : x
2. Step 2: Convert to fraction form
   12,179.52/16,811.34 = 7,144.80/x
3. Step 3: Cross multiply
   12,179.52x = 16,811.34 × 7,144.80
4. Step 4: Simplify right side
   12,179.52x = 120,113,662.03
5. Step 5: Solve for x
   x = 120,113,662.03/12,179.52
6. Step 6: Final answer
   x = 9,861.94