Finding the Fourth Proportional to 5,406.69, 7,439.57 and 4,147.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,406.69 : 7,439.57 = 4,147.25 : x
2. Step 2: Convert to fraction form
   5,406.69/7,439.57 = 4,147.25/x
3. Step 3: Cross multiply
   5,406.69x = 7,439.57 × 4,147.25
4. Step 4: Simplify right side
   5,406.69x = 30,853,698.75
5. Step 5: Solve for x
   x = 30,853,698.75/5,406.69
6. Step 6: Final answer
   x = 5,706.58