Finding the Fourth Proportional to 3,915.59, 5,400.37 and 3,442.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.59 : 5,400.37 = 3,442.48 : x
2. Step 2: Convert to fraction form
   3,915.59/5,400.37 = 3,442.48/x
3. Step 3: Cross multiply
   3,915.59x = 5,400.37 × 3,442.48
4. Step 4: Simplify right side
   3,915.59x = 18,590,665.72
5. Step 5: Solve for x
   x = 18,590,665.72/3,915.59
6. Step 6: Final answer
   x = 4,747.86