Finding the Fourth Proportional to 2,082.45, 3,121.27 and 912.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.45 : 3,121.27 = 912.07 : x
2. Step 2: Convert to fraction form
   2,082.45/3,121.27 = 912.07/x
3. Step 3: Cross multiply
   2,082.45x = 3,121.27 × 912.07
4. Step 4: Simplify right side
   2,082.45x = 2,846,816.73
5. Step 5: Solve for x
   x = 2,846,816.73/2,082.45
6. Step 6: Final answer
   x = 1,367.05