Finding the Third Proportional to 31,028 and 64,678

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028 : 64,678 = 64,678 : x
2. Step 2: Convert to fraction form
   31,028/64,678 = 64,678/x
3. Step 3: Cross multiply
   31,028x = 64,678 × 64,678
4. Step 4: Simplify right side
   31,028x = 4,183,243,684
5. Step 5: Solve for x
   x = 4,183,243,684/31,028
6. Step 6: Final answer
   x = 134,821.57