Finding the Fourth Proportional to 3,855.89, 5,783.78 and 934.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,855.89 : 5,783.78 = 934.18 : x
2. Step 2: Convert to fraction form
   3,855.89/5,783.78 = 934.18/x
3. Step 3: Cross multiply
   3,855.89x = 5,783.78 × 934.18
4. Step 4: Simplify right side
   3,855.89x = 5,403,079.48
5. Step 5: Solve for x
   x = 5,403,079.48/3,855.89
6. Step 6: Final answer
   x = 1,401.25