Finding the Third Proportional to 111,656 and 243,355

Step by Step Solution

1. Step 1: Write the proportion equation
   111,656 : 243,355 = 243,355 : x
2. Step 2: Convert to fraction form
   111,656/243,355 = 243,355/x
3. Step 3: Cross multiply
   111,656x = 243,355 × 243,355
4. Step 4: Simplify right side
   111,656x = 59,221,656,025
5. Step 5: Solve for x
   x = 59,221,656,025/111,656
6. Step 6: Final answer
   x = 530,393.85