Finding the Fourth Proportional to 2,605.72, 3,907.88 and 731.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.72 : 3,907.88 = 731.49 : x
2. Step 2: Convert to fraction form
   2,605.72/3,907.88 = 731.49/x
3. Step 3: Cross multiply
   2,605.72x = 3,907.88 × 731.49
4. Step 4: Simplify right side
   2,605.72x = 2,858,571.48
5. Step 5: Solve for x
   x = 2,858,571.48/2,605.72
6. Step 6: Final answer
   x = 1,097.04