Finding the Fourth Proportional to 12,638.25, 18,957.42 and 3,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.25 : 18,957.42 = 3,404.25 : x
2. Step 2: Convert to fraction form
   12,638.25/18,957.42 = 3,404.25/x
3. Step 3: Cross multiply
   12,638.25x = 18,957.42 × 3,404.25
4. Step 4: Simplify right side
   12,638.25x = 64,535,797.04
5. Step 5: Solve for x
   x = 64,535,797.04/12,638.25
6. Step 6: Final answer
   x = 5,106.39