Finding the Fourth Proportional to 2,082.42, 3,121.20 and 1,672.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.42 : 3,121.20 = 1,672.02 : x
2. Step 2: Convert to fraction form
   2,082.42/3,121.20 = 1,672.02/x
3. Step 3: Cross multiply
   2,082.42x = 3,121.20 × 1,672.02
4. Step 4: Simplify right side
   2,082.42x = 5,218,708.82
5. Step 5: Solve for x
   x = 5,218,708.82/2,082.42
6. Step 6: Final answer
   x = 2,506.08