Finding the Fourth Proportional to 12,271.85, 18,409.51 and 3,949.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,271.85 : 18,409.51 = 3,949.93 : x
2. Step 2: Convert to fraction form
   12,271.85/18,409.51 = 3,949.93/x
3. Step 3: Cross multiply
   12,271.85x = 18,409.51 × 3,949.93
4. Step 4: Simplify right side
   12,271.85x = 72,716,275.83
5. Step 5: Solve for x
   x = 72,716,275.83/12,271.85
6. Step 6: Final answer
   x = 5,925.45