Finding the Fourth Proportional to 12,272.46, 18,411.21 and 3,949.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,272.46 : 18,411.21 = 3,949.98 : x
2. Step 2: Convert to fraction form
   12,272.46/18,411.21 = 3,949.98/x
3. Step 3: Cross multiply
   12,272.46x = 18,411.21 × 3,949.98
4. Step 4: Simplify right side
   12,272.46x = 72,723,911.28
5. Step 5: Solve for x
   x = 72,723,911.28/12,272.46
6. Step 6: Final answer
   x = 5,925.78