Finding the Third Proportional to 30,320 and 64,852

Step by Step Solution

1. Step 1: Write the proportion equation
   30,320 : 64,852 = 64,852 : x
2. Step 2: Convert to fraction form
   30,320/64,852 = 64,852/x
3. Step 3: Cross multiply
   30,320x = 64,852 × 64,852
4. Step 4: Simplify right side
   30,320x = 4,205,781,904
5. Step 5: Solve for x
   x = 4,205,781,904/30,320
6. Step 6: Final answer
   x = 138,713.12