Finding the Fourth Proportional to 3,908.82, 5,394.69 and 2,515.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908.82 : 5,394.69 = 2,515.62 : x
2. Step 2: Convert to fraction form
   3,908.82/5,394.69 = 2,515.62/x
3. Step 3: Cross multiply
   3,908.82x = 5,394.69 × 2,515.62
4. Step 4: Simplify right side
   3,908.82x = 13,570,990.06
5. Step 5: Solve for x
   x = 13,570,990.06/3,908.82
6. Step 6: Final answer
   x = 3,471.89