Finding the Fourth Proportional to 3,915.92, 5,404.05 and 2,147.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.92 : 5,404.05 = 2,147.42 : x
2. Step 2: Convert to fraction form
   3,915.92/5,404.05 = 2,147.42/x
3. Step 3: Cross multiply
   3,915.92x = 5,404.05 × 2,147.42
4. Step 4: Simplify right side
   3,915.92x = 11,604,778.56
5. Step 5: Solve for x
   x = 11,604,778.56/3,915.92
6. Step 6: Final answer
   x = 2,963.49