Finding the Fourth Proportional to 12,981.06, 19,474.02 and 4,218.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.06 : 19,474.02 = 4,218.48 : x
2. Step 2: Convert to fraction form
   12,981.06/19,474.02 = 4,218.48/x
3. Step 3: Cross multiply
   12,981.06x = 19,474.02 × 4,218.48
4. Step 4: Simplify right side
   12,981.06x = 82,150,763.89
5. Step 5: Solve for x
   x = 82,150,763.89/12,981.06
6. Step 6: Final answer
   x = 6,328.51