Finding the Fourth Proportional to 2,082.41, 3,123.60 and 1,390.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.41 : 3,123.60 = 1,390.43 : x
2. Step 2: Convert to fraction form
   2,082.41/3,123.60 = 1,390.43/x
3. Step 3: Cross multiply
   2,082.41x = 3,123.60 × 1,390.43
4. Step 4: Simplify right side
   2,082.41x = 4,343,147.15
5. Step 5: Solve for x
   x = 4,343,147.15/2,082.41
6. Step 6: Final answer
   x = 2,085.63