Finding the Third Proportional to 111,744 and 243,189

Step by Step Solution

1. Step 1: Write the proportion equation
   111,744 : 243,189 = 243,189 : x
2. Step 2: Convert to fraction form
   111,744/243,189 = 243,189/x
3. Step 3: Cross multiply
   111,744x = 243,189 × 243,189
4. Step 4: Simplify right side
   111,744x = 59,140,889,721
5. Step 5: Solve for x
   x = 59,140,889,721/111,744
6. Step 6: Final answer
   x = 529,253.38