Finding the Fourth Proportional to 2,603.53, 3,905.71 and 1,123.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.53 : 3,905.71 = 1,123.18 : x
2. Step 2: Convert to fraction form
   2,603.53/3,905.71 = 1,123.18/x
3. Step 3: Cross multiply
   2,603.53x = 3,905.71 × 1,123.18
4. Step 4: Simplify right side
   2,603.53x = 4,386,790.21
5. Step 5: Solve for x
   x = 4,386,790.21/2,603.53
6. Step 6: Final answer
   x = 1,684.94