Finding the Fourth Proportional to 3,920.71, 5,410.33 and 2,152.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.71 : 5,410.33 = 2,152.31 : x
2. Step 2: Convert to fraction form
   3,920.71/5,410.33 = 2,152.31/x
3. Step 3: Cross multiply
   3,920.71x = 5,410.33 × 2,152.31
4. Step 4: Simplify right side
   3,920.71x = 11,644,687.04
5. Step 5: Solve for x
   x = 11,644,687.04/3,920.71
6. Step 6: Final answer
   x = 2,970.05