Finding the Third Proportional to 111,812 and 243,308

Step by Step Solution

1. Step 1: Write the proportion equation
   111,812 : 243,308 = 243,308 : x
2. Step 2: Convert to fraction form
   111,812/243,308 = 243,308/x
3. Step 3: Cross multiply
   111,812x = 243,308 × 243,308
4. Step 4: Simplify right side
   111,812x = 59,198,782,864
5. Step 5: Solve for x
   x = 59,198,782,864/111,812
6. Step 6: Final answer
   x = 529,449.28