Finding the Third Proportional to 111,545 and 243,398

Step by Step Solution

1. Step 1: Write the proportion equation
   111,545 : 243,398 = 243,398 : x
2. Step 2: Convert to fraction form
   111,545/243,398 = 243,398/x
3. Step 3: Cross multiply
   111,545x = 243,398 × 243,398
4. Step 4: Simplify right side
   111,545x = 59,242,586,404
5. Step 5: Solve for x
   x = 59,242,586,404/111,545
6. Step 6: Final answer
   x = 531,109.30