Finding the Fourth Proportional to 12,715.38, 19,072.67 and 3,947.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,715.38 : 19,072.67 = 3,947.94 : x
2. Step 2: Convert to fraction form
   12,715.38/19,072.67 = 3,947.94/x
3. Step 3: Cross multiply
   12,715.38x = 19,072.67 × 3,947.94
4. Step 4: Simplify right side
   12,715.38x = 75,297,737.06
5. Step 5: Solve for x
   x = 75,297,737.06/12,715.38
6. Step 6: Final answer
   x = 5,921.78