Finding the Fourth Proportional to 3,907.07, 5,391.96 and 2,228.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,907.07 : 5,391.96 = 2,228.69 : x
2. Step 2: Convert to fraction form
   3,907.07/5,391.96 = 2,228.69/x
3. Step 3: Cross multiply
   3,907.07x = 5,391.96 × 2,228.69
4. Step 4: Simplify right side
   3,907.07x = 12,017,012.45
5. Step 5: Solve for x
   x = 12,017,012.45/3,907.07
6. Step 6: Final answer
   x = 3,075.71