Finding the Third Proportional to 2,908.13 and 3,909.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,908.13 : 3,909.56 = 3,909.56 : x
2. Step 2: Convert to fraction form
   2,908.13/3,909.56 = 3,909.56/x
3. Step 3: Cross multiply
   2,908.13x = 3,909.56 × 3,909.56
4. Step 4: Simplify right side
   2,908.13x = 15,284,678.94
5. Step 5: Solve for x
   x = 15,284,678.94/2,908.13
6. Step 6: Final answer
   x = 5,255.85