Finding the Fourth Proportional to 12,981.54, 19,470.48 and 4,216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.54 : 19,470.48 = 4,216.56 : x
2. Step 2: Convert to fraction form
   12,981.54/19,470.48 = 4,216.56/x
3. Step 3: Cross multiply
   12,981.54x = 19,470.48 × 4,216.56
4. Step 4: Simplify right side
   12,981.54x = 82,098,447.15
5. Step 5: Solve for x
   x = 82,098,447.15/12,981.54
6. Step 6: Final answer
   x = 6,324.25