Finding the Third Proportional to 2,057.06 and 4,909.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.06 : 4,909.78 = 4,909.78 : x
2. Step 2: Convert to fraction form
   2,057.06/4,909.78 = 4,909.78/x
3. Step 3: Cross multiply
   2,057.06x = 4,909.78 × 4,909.78
4. Step 4: Simplify right side
   2,057.06x = 24,105,951.92
5. Step 5: Solve for x
   x = 24,105,951.92/2,057.06
6. Step 6: Final answer
   x = 11,718.63