Finding the Fourth Proportional to 2,685.42, 4,026.61 and 1,123.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.42 : 4,026.61 = 1,123.74 : x
2. Step 2: Convert to fraction form
   2,685.42/4,026.61 = 1,123.74/x
3. Step 3: Cross multiply
   2,685.42x = 4,026.61 × 1,123.74
4. Step 4: Simplify right side
   2,685.42x = 4,524,862.72
5. Step 5: Solve for x
   x = 4,524,862.72/2,685.42
6. Step 6: Final answer
   x = 1,684.97