Finding the Fourth Proportional to 2,192.72, 3,289.72 and 806.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,192.72 : 3,289.72 = 806.48 : x
2. Step 2: Convert to fraction form
   2,192.72/3,289.72 = 806.48/x
3. Step 3: Cross multiply
   2,192.72x = 3,289.72 × 806.48
4. Step 4: Simplify right side
   2,192.72x = 2,653,093.39
5. Step 5: Solve for x
   x = 2,653,093.39/2,192.72
6. Step 6: Final answer
   x = 1,209.96