Finding the Third Proportional to 30,656 and 65,685

Step by Step Solution

1. Step 1: Write the proportion equation
   30,656 : 65,685 = 65,685 : x
2. Step 2: Convert to fraction form
   30,656/65,685 = 65,685/x
3. Step 3: Cross multiply
   30,656x = 65,685 × 65,685
4. Step 4: Simplify right side
   30,656x = 4,314,519,225
5. Step 5: Solve for x
   x = 4,314,519,225/30,656
6. Step 6: Final answer
   x = 140,739.80