Finding the Fourth Proportional to 3,438.52, 5,160.25 and 2,660.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,438.52 : 5,160.25 = 2,660.42 : x
2. Step 2: Convert to fraction form
   3,438.52/5,160.25 = 2,660.42/x
3. Step 3: Cross multiply
   3,438.52x = 5,160.25 × 2,660.42
4. Step 4: Simplify right side
   3,438.52x = 13,728,432.31
5. Step 5: Solve for x
   x = 13,728,432.31/3,438.52
6. Step 6: Final answer
   x = 3,992.54