Finding the Fourth Proportional to 12,178.04, 16,805.94 and 7,146.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,178.04 : 16,805.94 = 7,146.12 : x
2. Step 2: Convert to fraction form
   12,178.04/16,805.94 = 7,146.12/x
3. Step 3: Cross multiply
   12,178.04x = 16,805.94 × 7,146.12
4. Step 4: Simplify right side
   12,178.04x = 120,097,263.95
5. Step 5: Solve for x
   x = 120,097,263.95/12,178.04
6. Step 6: Final answer
   x = 9,861.79