Finding the Fourth Proportional to 1,123.94, 1,683.30 and 1,085.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.94 : 1,683.30 = 1,085.02 : x
2. Step 2: Convert to fraction form
   1,123.94/1,683.30 = 1,085.02/x
3. Step 3: Cross multiply
   1,123.94x = 1,683.30 × 1,085.02
4. Step 4: Simplify right side
   1,123.94x = 1,826,414.17
5. Step 5: Solve for x
   x = 1,826,414.17/1,123.94
6. Step 6: Final answer
   x = 1,625.01