Finding the Fourth Proportional to 12,945.56, 19,414.22 and 4,178.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.56 : 19,414.22 = 4,178.43 : x
2. Step 2: Convert to fraction form
   12,945.56/19,414.22 = 4,178.43/x
3. Step 3: Cross multiply
   12,945.56x = 19,414.22 × 4,178.43
4. Step 4: Simplify right side
   12,945.56x = 81,120,938.38
5. Step 5: Solve for x
   x = 81,120,938.38/12,945.56
6. Step 6: Final answer
   x = 6,266.32