Finding the Fourth Proportional to 12,271.21, 18,409.34 and 3,948.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,271.21 : 18,409.34 = 3,948.73 : x
2. Step 2: Convert to fraction form
   12,271.21/18,409.34 = 3,948.73/x
3. Step 3: Cross multiply
   12,271.21x = 18,409.34 × 3,948.73
4. Step 4: Simplify right side
   12,271.21x = 72,693,493.39
5. Step 5: Solve for x
   x = 72,693,493.39/12,271.21
6. Step 6: Final answer
   x = 5,923.91