Finding the Fourth Proportional to 1,591.43, 2,196.35 and 1,540.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.43 : 2,196.35 = 1,540.40 : x
2. Step 2: Convert to fraction form
   1,591.43/2,196.35 = 1,540.40/x
3. Step 3: Cross multiply
   1,591.43x = 2,196.35 × 1,540.40
4. Step 4: Simplify right side
   1,591.43x = 3,383,244.63
5. Step 5: Solve for x
   x = 3,383,244.63/1,591.43
6. Step 6: Final answer
   x = 2,125.92