Finding the Fourth Proportional to 13,838.43, 20,757.72 and 3,450.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,838.43 : 20,757.72 = 3,450.18 : x
2. Step 2: Convert to fraction form
   13,838.43/20,757.72 = 3,450.18/x
3. Step 3: Cross multiply
   13,838.43x = 20,757.72 × 3,450.18
4. Step 4: Simplify right side
   13,838.43x = 71,617,870.39
5. Step 5: Solve for x
   x = 71,617,870.39/13,838.43
6. Step 6: Final answer
   x = 5,175.29