Finding the Fourth Proportional to 3,454.96, 5,182.38 and 857.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,454.96 : 5,182.38 = 857.89 : x
2. Step 2: Convert to fraction form
   3,454.96/5,182.38 = 857.89/x
3. Step 3: Cross multiply
   3,454.96x = 5,182.38 × 857.89
4. Step 4: Simplify right side
   3,454.96x = 4,445,911.98
5. Step 5: Solve for x
   x = 4,445,911.98/3,454.96
6. Step 6: Final answer
   x = 1,286.82