Finding the Fourth Proportional to 3,951.08, 5,449.38 and 3,686.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,951.08 : 5,449.38 = 3,686.12 : x
2. Step 2: Convert to fraction form
   3,951.08/5,449.38 = 3,686.12/x
3. Step 3: Cross multiply
   3,951.08x = 5,449.38 × 3,686.12
4. Step 4: Simplify right side
   3,951.08x = 20,087,068.61
5. Step 5: Solve for x
   x = 20,087,068.61/3,951.08
6. Step 6: Final answer
   x = 5,083.94