Finding the Third Proportional to 2,718.56 and 4,134.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.56 : 4,134.80 = 4,134.80 : x
2. Step 2: Convert to fraction form
   2,718.56/4,134.80 = 4,134.80/x
3. Step 3: Cross multiply
   2,718.56x = 4,134.80 × 4,134.80
4. Step 4: Simplify right side
   2,718.56x = 17,096,545.20
5. Step 5: Solve for x
   x = 17,096,545.20/2,718.56
6. Step 6: Final answer
   x = 6,288.82