Finding the Fourth Proportional to 2,640.06, 3,643.38 and 1,591.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.06 : 3,643.38 = 1,591.92 : x
2. Step 2: Convert to fraction form
   2,640.06/3,643.38 = 1,591.92/x
3. Step 3: Cross multiply
   2,640.06x = 3,643.38 × 1,591.92
4. Step 4: Simplify right side
   2,640.06x = 5,799,969.49
5. Step 5: Solve for x
   x = 5,799,969.49/2,640.06
6. Step 6: Final answer
   x = 2,196.91