Finding the Fourth Proportional to 3,436.20, 4,742.72 and 2,845.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.20 : 4,742.72 = 2,845.71 : x
2. Step 2: Convert to fraction form
   3,436.20/4,742.72 = 2,845.71/x
3. Step 3: Cross multiply
   3,436.20x = 4,742.72 × 2,845.71
4. Step 4: Simplify right side
   3,436.20x = 13,496,405.73
5. Step 5: Solve for x
   x = 13,496,405.73/3,436.20
6. Step 6: Final answer
   x = 3,927.71