Finding the Fourth Proportional to 3,685.20, 5,108.82 and 3,487.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.20 : 5,108.82 = 3,487.92 : x
2. Step 2: Convert to fraction form
   3,685.20/5,108.82 = 3,487.92/x
3. Step 3: Cross multiply
   3,685.20x = 5,108.82 × 3,487.92
4. Step 4: Simplify right side
   3,685.20x = 17,819,155.45
5. Step 5: Solve for x
   x = 17,819,155.45/3,685.20
6. Step 6: Final answer
   x = 4,835.33