Finding the Fourth Proportional to 2,605.07, 3,907.59 and 1,306.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.07 : 3,907.59 = 1,306.52 : x
2. Step 2: Convert to fraction form
   2,605.07/3,907.59 = 1,306.52/x
3. Step 3: Cross multiply
   2,605.07x = 3,907.59 × 1,306.52
4. Step 4: Simplify right side
   2,605.07x = 5,105,344.49
5. Step 5: Solve for x
   x = 5,105,344.49/2,605.07
6. Step 6: Final answer
   x = 1,959.77