Finding the Fourth Proportional to 3,937.04, 5,433.20 and 2,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,937.04 : 5,433.20 = 2,168.72 : x
2. Step 2: Convert to fraction form
   3,937.04/5,433.20 = 2,168.72/x
3. Step 3: Cross multiply
   3,937.04x = 5,433.20 × 2,168.72
4. Step 4: Simplify right side
   3,937.04x = 11,783,089.50
5. Step 5: Solve for x
   x = 11,783,089.50/3,937.04
6. Step 6: Final answer
   x = 2,992.88