Finding the Fourth Proportional to 2,578.18, 3,867.54 and 846.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.18 : 3,867.54 = 846.94 : x
2. Step 2: Convert to fraction form
   2,578.18/3,867.54 = 846.94/x
3. Step 3: Cross multiply
   2,578.18x = 3,867.54 × 846.94
4. Step 4: Simplify right side
   2,578.18x = 3,275,574.33
5. Step 5: Solve for x
   x = 3,275,574.33/2,578.18
6. Step 6: Final answer
   x = 1,270.50