Finding the Third Proportional to 209,717 and 333,577.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,717 : 333,577.50 = 333,577.50 : x
2. Step 2: Convert to fraction form
   209,717/333,577.50 = 333,577.50/x
3. Step 3: Cross multiply
   209,717x = 333,577.50 × 333,577.50
4. Step 4: Simplify right side
   209,717x = 111,273,948,506.25
5. Step 5: Solve for x
   x = 111,273,948,506.25/209,717
6. Step 6: Final answer
   x = 530,590.98