Finding the Fourth Proportional to 3,938.34, 5,429.87 and 3,227.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.34 : 5,429.87 = 3,227.57 : x
2. Step 2: Convert to fraction form
   3,938.34/5,429.87 = 3,227.57/x
3. Step 3: Cross multiply
   3,938.34x = 5,429.87 × 3,227.57
4. Step 4: Simplify right side
   3,938.34x = 17,525,242.23
5. Step 5: Solve for x
   x = 17,525,242.23/3,938.34
6. Step 6: Final answer
   x = 4,449.91