Finding the Fourth Proportional to 3,938.72, 5,890.64 and 3,503.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.72 : 5,890.64 = 3,503.03 : x
2. Step 2: Convert to fraction form
   3,938.72/5,890.64 = 3,503.03/x
3. Step 3: Cross multiply
   3,938.72x = 5,890.64 × 3,503.03
4. Step 4: Simplify right side
   3,938.72x = 20,635,085.85
5. Step 5: Solve for x
   x = 20,635,085.85/3,938.72
6. Step 6: Final answer
   x = 5,239.04