Finding the Third Proportional to 229,810.50 and 321,435

Step by Step Solution

1. Step 1: Write the proportion equation
   229,810.50 : 321,435 = 321,435 : x
2. Step 2: Convert to fraction form
   229,810.50/321,435 = 321,435/x
3. Step 3: Cross multiply
   229,810.50x = 321,435 × 321,435
4. Step 4: Simplify right side
   229,810.50x = 103,320,459,225
5. Step 5: Solve for x
   x = 103,320,459,225/229,810.50
6. Step 6: Final answer
   x = 449,589.81