Finding the Fourth Proportional to 1,906.05, 2,855.50 and 1,123.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.05 : 2,855.50 = 1,123.74 : x
2. Step 2: Convert to fraction form
   1,906.05/2,855.50 = 1,123.74/x
3. Step 3: Cross multiply
   1,906.05x = 2,855.50 × 1,123.74
4. Step 4: Simplify right side
   1,906.05x = 3,208,839.57
5. Step 5: Solve for x
   x = 3,208,839.57/1,906.05
6. Step 6: Final answer
   x = 1,683.50