Finding the Fourth Proportional to 3,436.27, 4,742.17 and 2,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.27 : 4,742.17 = 2,109.72 : x
2. Step 2: Convert to fraction form
   3,436.27/4,742.17 = 2,109.72/x
3. Step 3: Cross multiply
   3,436.27x = 4,742.17 × 2,109.72
4. Step 4: Simplify right side
   3,436.27x = 10,004,650.89
5. Step 5: Solve for x
   x = 10,004,650.89/3,436.27
6. Step 6: Final answer
   x = 2,911.49