Finding the Third Proportional to 111,728 and 243,112

Step by Step Solution

1. Step 1: Write the proportion equation
   111,728 : 243,112 = 243,112 : x
2. Step 2: Convert to fraction form
   111,728/243,112 = 243,112/x
3. Step 3: Cross multiply
   111,728x = 243,112 × 243,112
4. Step 4: Simplify right side
   111,728x = 59,103,444,544
5. Step 5: Solve for x
   x = 59,103,444,544/111,728
6. Step 6: Final answer
   x = 528,994.03