Finding the Fourth Proportional to 2,104.82, 3,157.50 and 806.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.82 : 3,157.50 = 806.12 : x
2. Step 2: Convert to fraction form
   2,104.82/3,157.50 = 806.12/x
3. Step 3: Cross multiply
   2,104.82x = 3,157.50 × 806.12
4. Step 4: Simplify right side
   2,104.82x = 2,545,323.90
5. Step 5: Solve for x
   x = 2,545,323.90/2,104.82
6. Step 6: Final answer
   x = 1,209.28