Finding the Fourth Proportional to 3,935.72, 5,902.50 and 3,499.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,935.72 : 5,902.50 = 3,499.40 : x
2. Step 2: Convert to fraction form
   3,935.72/5,902.50 = 3,499.40/x
3. Step 3: Cross multiply
   3,935.72x = 5,902.50 × 3,499.40
4. Step 4: Simplify right side
   3,935.72x = 20,655,208.50
5. Step 5: Solve for x
   x = 20,655,208.50/3,935.72
6. Step 6: Final answer
   x = 5,248.14