Finding the Fourth Proportional to 3,945.21, 5,907.72 and 3,828.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.21 : 5,907.72 = 3,828.42 : x
2. Step 2: Convert to fraction form
   3,945.21/5,907.72 = 3,828.42/x
3. Step 3: Cross multiply
   3,945.21x = 5,907.72 × 3,828.42
4. Step 4: Simplify right side
   3,945.21x = 22,617,233.40
5. Step 5: Solve for x
   x = 22,617,233.40/3,945.21
6. Step 6: Final answer
   x = 5,732.83