Finding the Fourth Proportional to 2,639.52, 3,642.57 and 1,591.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.52 : 3,642.57 = 1,591.92 : x
2. Step 2: Convert to fraction form
   2,639.52/3,642.57 = 1,591.92/x
3. Step 3: Cross multiply
   2,639.52x = 3,642.57 × 1,591.92
4. Step 4: Simplify right side
   2,639.52x = 5,798,680.03
5. Step 5: Solve for x
   x = 5,798,680.03/2,639.52
6. Step 6: Final answer
   x = 2,196.87