Finding the Fourth Proportional to 12,724.38, 19,083.78 and 3,957.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.38 : 19,083.78 = 3,957.30 : x
2. Step 2: Convert to fraction form
   12,724.38/19,083.78 = 3,957.30/x
3. Step 3: Cross multiply
   12,724.38x = 19,083.78 × 3,957.30
4. Step 4: Simplify right side
   12,724.38x = 75,520,242.59
5. Step 5: Solve for x
   x = 75,520,242.59/12,724.38
6. Step 6: Final answer
   x = 5,935.08