Finding the Fourth Proportional to 12,728.58, 19,091.96 and 3,963.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728.58 : 19,091.96 = 3,963.27 : x
2. Step 2: Convert to fraction form
   12,728.58/19,091.96 = 3,963.27/x
3. Step 3: Cross multiply
   12,728.58x = 19,091.96 × 3,963.27
4. Step 4: Simplify right side
   12,728.58x = 75,666,592.31
5. Step 5: Solve for x
   x = 75,666,592.31/12,728.58
6. Step 6: Final answer
   x = 5,944.62