Finding the Fourth Proportional to 12,213.95, 18,321.56 and 3,449.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,213.95 : 18,321.56 = 3,449.54 : x
2. Step 2: Convert to fraction form
   12,213.95/18,321.56 = 3,449.54/x
3. Step 3: Cross multiply
   12,213.95x = 18,321.56 × 3,449.54
4. Step 4: Simplify right side
   12,213.95x = 63,200,995.57
5. Step 5: Solve for x
   x = 63,200,995.57/12,213.95
6. Step 6: Final answer
   x = 5,174.49