Finding the Third Proportional to 30,612 and 64,864

Step by Step Solution

1. Step 1: Write the proportion equation
   30,612 : 64,864 = 64,864 : x
2. Step 2: Convert to fraction form
   30,612/64,864 = 64,864/x
3. Step 3: Cross multiply
   30,612x = 64,864 × 64,864
4. Step 4: Simplify right side
   30,612x = 4,207,338,496
5. Step 5: Solve for x
   x = 4,207,338,496/30,612
6. Step 6: Final answer
   x = 137,440.82