Finding the Third Proportional to 213,273 and 324,517.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,273 : 324,517.50 = 324,517.50 : x
2. Step 2: Convert to fraction form
   213,273/324,517.50 = 324,517.50/x
3. Step 3: Cross multiply
   213,273x = 324,517.50 × 324,517.50
4. Step 4: Simplify right side
   213,273x = 105,311,607,806.25
5. Step 5: Solve for x
   x = 105,311,607,806.25/213,273
6. Step 6: Final answer
   x = 493,787.81