Finding the Fourth Proportional to 3,209.14, 4,817.34 and 2,155.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,209.14 : 4,817.34 = 2,155.72 : x
2. Step 2: Convert to fraction form
   3,209.14/4,817.34 = 2,155.72/x
3. Step 3: Cross multiply
   3,209.14x = 4,817.34 × 2,155.72
4. Step 4: Simplify right side
   3,209.14x = 10,384,836.18
5. Step 5: Solve for x
   x = 10,384,836.18/3,209.14
6. Step 6: Final answer
   x = 3,236.02