Finding the Third Proportional to 129,820 and 200,462

Step by Step Solution

1. Step 1: Write the proportion equation
   129,820 : 200,462 = 200,462 : x
2. Step 2: Convert to fraction form
   129,820/200,462 = 200,462/x
3. Step 3: Cross multiply
   129,820x = 200,462 × 200,462
4. Step 4: Simplify right side
   129,820x = 40,185,013,444
5. Step 5: Solve for x
   x = 40,185,013,444/129,820
6. Step 6: Final answer
   x = 309,544.09