Finding the Fourth Proportional to 2,082.72, 3,121.35 and 849.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.72 : 3,121.35 = 849.45 : x
2. Step 2: Convert to fraction form
   2,082.72/3,121.35 = 849.45/x
3. Step 3: Cross multiply
   2,082.72x = 3,121.35 × 849.45
4. Step 4: Simplify right side
   2,082.72x = 2,651,430.76
5. Step 5: Solve for x
   x = 2,651,430.76/2,082.72
6. Step 6: Final answer
   x = 1,273.06