Finding the Third Proportional to 108,945 and 243,405

Step by Step Solution

1. Step 1: Write the proportion equation
   108,945 : 243,405 = 243,405 : x
2. Step 2: Convert to fraction form
   108,945/243,405 = 243,405/x
3. Step 3: Cross multiply
   108,945x = 243,405 × 243,405
4. Step 4: Simplify right side
   108,945x = 59,245,994,025
5. Step 5: Solve for x
   x = 59,245,994,025/108,945
6. Step 6: Final answer
   x = 543,815.63