Finding the Third Proportional to 238,723.50 and 324,405

Step by Step Solution

1. Step 1: Write the proportion equation
   238,723.50 : 324,405 = 324,405 : x
2. Step 2: Convert to fraction form
   238,723.50/324,405 = 324,405/x
3. Step 3: Cross multiply
   238,723.50x = 324,405 × 324,405
4. Step 4: Simplify right side
   238,723.50x = 105,238,604,025
5. Step 5: Solve for x
   x = 105,238,604,025/238,723.50
6. Step 6: Final answer
   x = 440,838.90