Finding the Fourth Proportional to 2,103.52, 3,155.76 and 805.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.52 : 3,155.76 = 805.12 : x
2. Step 2: Convert to fraction form
   2,103.52/3,155.76 = 805.12/x
3. Step 3: Cross multiply
   2,103.52x = 3,155.76 × 805.12
4. Step 4: Simplify right side
   2,103.52x = 2,540,765.49
5. Step 5: Solve for x
   x = 2,540,765.49/2,103.52
6. Step 6: Final answer
   x = 1,207.86