Finding the Fourth Proportional to 12,729.80, 19,095.78 and 3,369.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.80 : 19,095.78 = 3,369.72 : x
2. Step 2: Convert to fraction form
   12,729.80/19,095.78 = 3,369.72/x
3. Step 3: Cross multiply
   12,729.80x = 19,095.78 × 3,369.72
4. Step 4: Simplify right side
   12,729.80x = 64,347,431.78
5. Step 5: Solve for x
   x = 64,347,431.78/12,729.80
6. Step 6: Final answer
   x = 5,054.87