Finding the Third Proportional to 111,659 and 243,395

Step by Step Solution

1. Step 1: Write the proportion equation
   111,659 : 243,395 = 243,395 : x
2. Step 2: Convert to fraction form
   111,659/243,395 = 243,395/x
3. Step 3: Cross multiply
   111,659x = 243,395 × 243,395
4. Step 4: Simplify right side
   111,659x = 59,241,126,025
5. Step 5: Solve for x
   x = 59,241,126,025/111,659
6. Step 6: Final answer
   x = 530,553.97