Finding the Third Proportional to 446,209.50 and 870,000

Step by Step Solution

1. Step 1: Write the proportion equation
   446,209.50 : 870,000 = 870,000 : x
2. Step 2: Convert to fraction form
   446,209.50/870,000 = 870,000/x
3. Step 3: Cross multiply
   446,209.50x = 870,000 × 870,000
4. Step 4: Simplify right side
   446,209.50x = 756,900,000,000
5. Step 5: Solve for x
   x = 756,900,000,000/446,209.50
6. Step 6: Final answer
   x = 1,696,288.40