Finding the Fourth Proportional to 2,356.15, 3,531.93 and 1,123.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,356.15 : 3,531.93 = 1,123.23 : x
2. Step 2: Convert to fraction form
   2,356.15/3,531.93 = 1,123.23/x
3. Step 3: Cross multiply
   2,356.15x = 3,531.93 × 1,123.23
4. Step 4: Simplify right side
   2,356.15x = 3,967,169.73
5. Step 5: Solve for x
   x = 3,967,169.73/2,356.15
6. Step 6: Final answer
   x = 1,683.75