Finding the Fourth Proportional to 3,941.72, 5,439.59 and 2,173.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,941.72 : 5,439.59 = 2,173.29 : x
2. Step 2: Convert to fraction form
   3,941.72/5,439.59 = 2,173.29/x
3. Step 3: Cross multiply
   3,941.72x = 5,439.59 × 2,173.29
4. Step 4: Simplify right side
   3,941.72x = 11,821,806.55
5. Step 5: Solve for x
   x = 11,821,806.55/3,941.72
6. Step 6: Final answer
   x = 2,999.15