Finding the Fourth Proportional to 3,915.28, 5,401.27 and 3,467.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.28 : 5,401.27 = 3,467.61 : x
2. Step 2: Convert to fraction form
   3,915.28/5,401.27 = 3,467.61/x
3. Step 3: Cross multiply
   3,915.28x = 5,401.27 × 3,467.61
4. Step 4: Simplify right side
   3,915.28x = 18,729,497.86
5. Step 5: Solve for x
   x = 18,729,497.86/3,915.28
6. Step 6: Final answer
   x = 4,783.69