Finding the Third Proportional to 286,990.50 and 447,930

Step by Step Solution

1. Step 1: Write the proportion equation
   286,990.50 : 447,930 = 447,930 : x
2. Step 2: Convert to fraction form
   286,990.50/447,930 = 447,930/x
3. Step 3: Cross multiply
   286,990.50x = 447,930 × 447,930
4. Step 4: Simplify right side
   286,990.50x = 200,641,284,900
5. Step 5: Solve for x
   x = 200,641,284,900/286,990.50
6. Step 6: Final answer
   x = 699,121.70