Finding the Third Proportional to 217,380 and 324,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,380 : 324,064.50 = 324,064.50 : x
2. Step 2: Convert to fraction form
   217,380/324,064.50 = 324,064.50/x
3. Step 3: Cross multiply
   217,380x = 324,064.50 × 324,064.50
4. Step 4: Simplify right side
   217,380x = 105,017,800,160.25
5. Step 5: Solve for x
   x = 105,017,800,160.25/217,380
6. Step 6: Final answer
   x = 483,107.00