Finding the Fourth Proportional to 12,648.72, 18,975.28 and 3,882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.72 : 18,975.28 = 3,882.72 : x
2. Step 2: Convert to fraction form
   12,648.72/18,975.28 = 3,882.72/x
3. Step 3: Cross multiply
   12,648.72x = 18,975.28 × 3,882.72
4. Step 4: Simplify right side
   12,648.72x = 73,675,699.16
5. Step 5: Solve for x
   x = 73,675,699.16/12,648.72
6. Step 6: Final answer
   x = 5,824.76