Finding the Third Proportional to 216,580.50 and 333,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,580.50 : 333,328.50 = 333,328.50 : x
2. Step 2: Convert to fraction form
   216,580.50/333,328.50 = 333,328.50/x
3. Step 3: Cross multiply
   216,580.50x = 333,328.50 × 333,328.50
4. Step 4: Simplify right side
   216,580.50x = 111,107,888,912.25
5. Step 5: Solve for x
   x = 111,107,888,912.25/216,580.50
6. Step 6: Final answer
   x = 513,009.66