Finding the Fourth Proportional to 3,701.20, 5,131.04 and 3,503.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,701.20 : 5,131.04 = 3,503.92 : x
2. Step 2: Convert to fraction form
   3,701.20/5,131.04 = 3,503.92/x
3. Step 3: Cross multiply
   3,701.20x = 5,131.04 × 3,503.92
4. Step 4: Simplify right side
   3,701.20x = 17,978,753.68
5. Step 5: Solve for x
   x = 17,978,753.68/3,701.20
6. Step 6: Final answer
   x = 4,857.55