Finding the Fourth Proportional to 2,685.39, 4,028.28 and 1,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.39 : 4,028.28 = 1,123.82 : x
2. Step 2: Convert to fraction form
   2,685.39/4,028.28 = 1,123.82/x
3. Step 3: Cross multiply
   2,685.39x = 4,028.28 × 1,123.82
4. Step 4: Simplify right side
   2,685.39x = 4,527,082.06
5. Step 5: Solve for x
   x = 4,527,082.06/2,685.39
6. Step 6: Final answer
   x = 1,685.82