Finding the Fourth Proportional to 2,082.24, 3,121.29 and 1,158.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.24 : 3,121.29 = 1,158.21 : x
2. Step 2: Convert to fraction form
   2,082.24/3,121.29 = 1,158.21/x
3. Step 3: Cross multiply
   2,082.24x = 3,121.29 × 1,158.21
4. Step 4: Simplify right side
   2,082.24x = 3,615,109.29
5. Step 5: Solve for x
   x = 3,615,109.29/2,082.24
6. Step 6: Final answer
   x = 1,736.16