Finding the Fourth Proportional to 3,940.16, 5,907.33 and 1,306.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.16 : 5,907.33 = 1,306.71 : x
2. Step 2: Convert to fraction form
   3,940.16/5,907.33 = 1,306.71/x
3. Step 3: Cross multiply
   3,940.16x = 5,907.33 × 1,306.71
4. Step 4: Simplify right side
   3,940.16x = 7,719,167.18
5. Step 5: Solve for x
   x = 7,719,167.18/3,940.16
6. Step 6: Final answer
   x = 1,959.10