Finding the Fourth Proportional to 2,591.06, 3,884.43 and 1,290.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.06 : 3,884.43 = 1,290.74 : x
2. Step 2: Convert to fraction form
   2,591.06/3,884.43 = 1,290.74/x
3. Step 3: Cross multiply
   2,591.06x = 3,884.43 × 1,290.74
4. Step 4: Simplify right side
   2,591.06x = 5,013,789.18
5. Step 5: Solve for x
   x = 5,013,789.18/2,591.06
6. Step 6: Final answer
   x = 1,935.03