Finding the Fourth Proportional to 2,609.53, 3,909.89 and 1,291.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.53 : 3,909.89 = 1,291.52 : x
2. Step 2: Convert to fraction form
   2,609.53/3,909.89 = 1,291.52/x
3. Step 3: Cross multiply
   2,609.53x = 3,909.89 × 1,291.52
4. Step 4: Simplify right side
   2,609.53x = 5,049,694.68
5. Step 5: Solve for x
   x = 5,049,694.68/2,609.53
6. Step 6: Final answer
   x = 1,935.10