Finding the Fourth Proportional to 2,640.24, 3,642.84 and 1,591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.24 : 3,642.84 = 1,591.56 : x
2. Step 2: Convert to fraction form
   2,640.24/3,642.84 = 1,591.56/x
3. Step 3: Cross multiply
   2,640.24x = 3,642.84 × 1,591.56
4. Step 4: Simplify right side
   2,640.24x = 5,797,798.43
5. Step 5: Solve for x
   x = 5,797,798.43/2,640.24
6. Step 6: Final answer
   x = 2,195.94