Finding the Fourth Proportional to 12,729.24, 19,091.73 and 3,963.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.24 : 19,091.73 = 3,963.47 : x
2. Step 2: Convert to fraction form
   12,729.24/19,091.73 = 3,963.47/x
3. Step 3: Cross multiply
   12,729.24x = 19,091.73 × 3,963.47
4. Step 4: Simplify right side
   12,729.24x = 75,669,499.10
5. Step 5: Solve for x
   x = 75,669,499.10/12,729.24
6. Step 6: Final answer
   x = 5,944.54