Finding the Third Proportional to 4,719 and 7,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   4,719 : 7,139.25 = 7,139.25 : x
2. Step 2: Convert to fraction form
   4,719/7,139.25 = 7,139.25/x
3. Step 3: Cross multiply
   4,719x = 7,139.25 × 7,139.25
4. Step 4: Simplify right side
   4,719x = 50,968,890.56
5. Step 5: Solve for x
   x = 50,968,890.56/4,719
6. Step 6: Final answer
   x = 10,800.78