Finding the Third Proportional to 111,657 and 243,357

Step by Step Solution

1. Step 1: Write the proportion equation
   111,657 : 243,357 = 243,357 : x
2. Step 2: Convert to fraction form
   111,657/243,357 = 243,357/x
3. Step 3: Cross multiply
   111,657x = 243,357 × 243,357
4. Step 4: Simplify right side
   111,657x = 59,222,629,449
5. Step 5: Solve for x
   x = 59,222,629,449/111,657
6. Step 6: Final answer
   x = 530,397.82