Finding the Fourth Proportional to 12,178.52, 16,806.12 and 7,986.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,178.52 : 16,806.12 = 7,986.50 : x
2. Step 2: Convert to fraction form
   12,178.52/16,806.12 = 7,986.50/x
3. Step 3: Cross multiply
   12,178.52x = 16,806.12 × 7,986.50
4. Step 4: Simplify right side
   12,178.52x = 134,222,077.38
5. Step 5: Solve for x
   x = 134,222,077.38/12,178.52
6. Step 6: Final answer
   x = 11,021.21