Finding the Fourth Proportional to 2,255.85, 3,382.56 and 938.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.85 : 3,382.56 = 938.79 : x
2. Step 2: Convert to fraction form
   2,255.85/3,382.56 = 938.79/x
3. Step 3: Cross multiply
   2,255.85x = 3,382.56 × 938.79
4. Step 4: Simplify right side
   2,255.85x = 3,175,513.50
5. Step 5: Solve for x
   x = 3,175,513.50/2,255.85
6. Step 6: Final answer
   x = 1,407.68