Finding the Fourth Proportional to 3,915.50, 5,391.41 and 3,602.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.50 : 5,391.41 = 3,602.03 : x
2. Step 2: Convert to fraction form
   3,915.50/5,391.41 = 3,602.03/x
3. Step 3: Cross multiply
   3,915.50x = 5,391.41 × 3,602.03
4. Step 4: Simplify right side
   3,915.50x = 19,419,975.60
5. Step 5: Solve for x
   x = 19,419,975.60/3,915.50
6. Step 6: Final answer
   x = 4,959.78