Finding the Third Proportional to 34,428 and 71,976

Step by Step Solution

1. Step 1: Write the proportion equation
   34,428 : 71,976 = 71,976 : x
2. Step 2: Convert to fraction form
   34,428/71,976 = 71,976/x
3. Step 3: Cross multiply
   34,428x = 71,976 × 71,976
4. Step 4: Simplify right side
   34,428x = 5,180,544,576
5. Step 5: Solve for x
   x = 5,180,544,576/34,428
6. Step 6: Final answer
   x = 150,474.75