Finding the Fourth Proportional to 3,401.55, 5,101.38 and 935.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.55 : 5,101.38 = 935.78 : x
2. Step 2: Convert to fraction form
   3,401.55/5,101.38 = 935.78/x
3. Step 3: Cross multiply
   3,401.55x = 5,101.38 × 935.78
4. Step 4: Simplify right side
   3,401.55x = 4,773,743.87
5. Step 5: Solve for x
   x = 4,773,743.87/3,401.55
6. Step 6: Final answer
   x = 1,403.40