Finding the Fourth Proportional to 2,639.44, 3,642.72 and 1,591.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.44 : 3,642.72 = 1,591.48 : x
2. Step 2: Convert to fraction form
   2,639.44/3,642.72 = 1,591.48/x
3. Step 3: Cross multiply
   2,639.44x = 3,642.72 × 1,591.48
4. Step 4: Simplify right side
   2,639.44x = 5,797,316.03
5. Step 5: Solve for x
   x = 5,797,316.03/2,639.44
6. Step 6: Final answer
   x = 2,196.42