Finding the Fourth Proportional to 3,403.75, 5,105.89 and 938.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,403.75 : 5,105.89 = 938.55 : x
2. Step 2: Convert to fraction form
   3,403.75/5,105.89 = 938.55/x
3. Step 3: Cross multiply
   3,403.75x = 5,105.89 × 938.55
4. Step 4: Simplify right side
   3,403.75x = 4,792,128.37
5. Step 5: Solve for x
   x = 4,792,128.37/3,403.75
6. Step 6: Final answer
   x = 1,407.90