Finding the Fourth Proportional to 3,915.78, 5,401.96 and 3,468.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.78 : 5,401.96 = 3,468.11 : x
2. Step 2: Convert to fraction form
   3,915.78/5,401.96 = 3,468.11/x
3. Step 3: Cross multiply
   3,915.78x = 5,401.96 × 3,468.11
4. Step 4: Simplify right side
   3,915.78x = 18,734,591.50
5. Step 5: Solve for x
   x = 18,734,591.50/3,915.78
6. Step 6: Final answer
   x = 4,784.38