Finding the Fourth Proportional to 2,591.28, 3,883.14 and 1,290.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.28 : 3,883.14 = 1,290.96 : x
2. Step 2: Convert to fraction form
   2,591.28/3,883.14 = 1,290.96/x
3. Step 3: Cross multiply
   2,591.28x = 3,883.14 × 1,290.96
4. Step 4: Simplify right side
   2,591.28x = 5,012,978.41
5. Step 5: Solve for x
   x = 5,012,978.41/2,591.28
6. Step 6: Final answer
   x = 1,934.56