Finding the Fourth Proportional to 3,934.71, 5,429.85 and 2,166.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.71 : 5,429.85 = 2,166.27 : x
2. Step 2: Convert to fraction form
   3,934.71/5,429.85 = 2,166.27/x
3. Step 3: Cross multiply
   3,934.71x = 5,429.85 × 2,166.27
4. Step 4: Simplify right side
   3,934.71x = 11,762,521.16
5. Step 5: Solve for x
   x = 11,762,521.16/3,934.71
6. Step 6: Final answer
   x = 2,989.43