Finding the Third Proportional to 111,545.25 and 243,399

Step by Step Solution

1. Step 1: Write the proportion equation
   111,545.25 : 243,399 = 243,399 : x
2. Step 2: Convert to fraction form
   111,545.25/243,399 = 243,399/x
3. Step 3: Cross multiply
   111,545.25x = 243,399 × 243,399
4. Step 4: Simplify right side
   111,545.25x = 59,243,073,201
5. Step 5: Solve for x
   x = 59,243,073,201/111,545.25
6. Step 6: Final answer
   x = 531,112.47