Finding the Fourth Proportional to 2,338.71, 3,227.40 and 1,290.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.71 : 3,227.40 = 1,290.75 : x
2. Step 2: Convert to fraction form
   2,338.71/3,227.40 = 1,290.75/x
3. Step 3: Cross multiply
   2,338.71x = 3,227.40 × 1,290.75
4. Step 4: Simplify right side
   2,338.71x = 4,165,766.55
5. Step 5: Solve for x
   x = 4,165,766.55/2,338.71
6. Step 6: Final answer
   x = 1,781.22