Finding the Third Proportional to 39,618 and 87,012

Step by Step Solution

1. Step 1: Write the proportion equation
   39,618 : 87,012 = 87,012 : x
2. Step 2: Convert to fraction form
   39,618/87,012 = 87,012/x
3. Step 3: Cross multiply
   39,618x = 87,012 × 87,012
4. Step 4: Simplify right side
   39,618x = 7,571,088,144
5. Step 5: Solve for x
   x = 7,571,088,144/39,618
6. Step 6: Final answer
   x = 191,102.23