Finding the Fourth Proportional to 2,418.13, 3,626.52 and 857.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.13 : 3,626.52 = 857.94 : x
2. Step 2: Convert to fraction form
   2,418.13/3,626.52 = 857.94/x
3. Step 3: Cross multiply
   2,418.13x = 3,626.52 × 857.94
4. Step 4: Simplify right side
   2,418.13x = 3,111,336.57
5. Step 5: Solve for x
   x = 3,111,336.57/2,418.13
6. Step 6: Final answer
   x = 1,286.67