Finding the Third Proportional to 111,636 and 242,145

Step by Step Solution

1. Step 1: Write the proportion equation
   111,636 : 242,145 = 242,145 : x
2. Step 2: Convert to fraction form
   111,636/242,145 = 242,145/x
3. Step 3: Cross multiply
   111,636x = 242,145 × 242,145
4. Step 4: Simplify right side
   111,636x = 58,634,201,025
5. Step 5: Solve for x
   x = 58,634,201,025/111,636
6. Step 6: Final answer
   x = 525,226.64