Finding the Fourth Proportional to 12,982.72, 19,472.16 and 4,216.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,982.72 : 19,472.16 = 4,216.48 : x
2. Step 2: Convert to fraction form
   12,982.72/19,472.16 = 4,216.48/x
3. Step 3: Cross multiply
   12,982.72x = 19,472.16 × 4,216.48
4. Step 4: Simplify right side
   12,982.72x = 82,103,973.20
5. Step 5: Solve for x
   x = 82,103,973.20/12,982.72
6. Step 6: Final answer
   x = 6,324.10