Finding the Fourth Proportional to 12,648.67, 18,971.38 and 3,882.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.67 : 18,971.38 = 3,882.85 : x
2. Step 2: Convert to fraction form
   12,648.67/18,971.38 = 3,882.85/x
3. Step 3: Cross multiply
   12,648.67x = 18,971.38 × 3,882.85
4. Step 4: Simplify right side
   12,648.67x = 73,663,022.83
5. Step 5: Solve for x
   x = 73,663,022.83/12,648.67
6. Step 6: Final answer
   x = 5,823.78