Finding the Third Proportional to 209,715 and 333,574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,715 : 333,574.50 = 333,574.50 : x
2. Step 2: Convert to fraction form
   209,715/333,574.50 = 333,574.50/x
3. Step 3: Cross multiply
   209,715x = 333,574.50 × 333,574.50
4. Step 4: Simplify right side
   209,715x = 111,271,947,050.25
5. Step 5: Solve for x
   x = 111,271,947,050.25/209,715
6. Step 6: Final answer
   x = 530,586.50