Finding the Fourth Proportional to 3,915.94, 5,404.33 and 2,147.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.94 : 5,404.33 = 2,147.89 : x
2. Step 2: Convert to fraction form
   3,915.94/5,404.33 = 2,147.89/x
3. Step 3: Cross multiply
   3,915.94x = 5,404.33 × 2,147.89
4. Step 4: Simplify right side
   3,915.94x = 11,607,906.36
5. Step 5: Solve for x
   x = 11,607,906.36/3,915.94
6. Step 6: Final answer
   x = 2,964.27