Finding the Fourth Proportional to 2,571.35, 3,854.59 and 1,271.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.35 : 3,854.59 = 1,271.30 : x
2. Step 2: Convert to fraction form
   2,571.35/3,854.59 = 1,271.30/x
3. Step 3: Cross multiply
   2,571.35x = 3,854.59 × 1,271.30
4. Step 4: Simplify right side
   2,571.35x = 4,900,317.82
5. Step 5: Solve for x
   x = 4,900,317.82/2,571.35
6. Step 6: Final answer
   x = 1,905.74