Finding the Third Proportional to 639,869.50 and 966,609

Step by Step Solution

1. Step 1: Write the proportion equation
   639,869.50 : 966,609 = 966,609 : x
2. Step 2: Convert to fraction form
   639,869.50/966,609 = 966,609/x
3. Step 3: Cross multiply
   639,869.50x = 966,609 × 966,609
4. Step 4: Simplify right side
   639,869.50x = 934,332,958,881
5. Step 5: Solve for x
   x = 934,332,958,881/639,869.50
6. Step 6: Final answer
   x = 1,460,192.99