Finding the Fourth Proportional to 2,591.21, 3,574.90 and 1,660.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.21 : 3,574.90 = 1,660.25 : x
2. Step 2: Convert to fraction form
   2,591.21/3,574.90 = 1,660.25/x
3. Step 3: Cross multiply
   2,591.21x = 3,574.90 × 1,660.25
4. Step 4: Simplify right side
   2,591.21x = 5,935,227.73
5. Step 5: Solve for x
   x = 5,935,227.73/2,591.21
6. Step 6: Final answer
   x = 2,290.52