Finding the Fourth Proportional to 2,245.34, 3,367.38 and 857.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,245.34 : 3,367.38 = 857.72 : x
2. Step 2: Convert to fraction form
   2,245.34/3,367.38 = 857.72/x
3. Step 3: Cross multiply
   2,245.34x = 3,367.38 × 857.72
4. Step 4: Simplify right side
   2,245.34x = 2,888,269.17
5. Step 5: Solve for x
   x = 2,888,269.17/2,245.34
6. Step 6: Final answer
   x = 1,286.34