Finding the Third Proportional to 190,570.50 and 406,449

Step by Step Solution

1. Step 1: Write the proportion equation
   190,570.50 : 406,449 = 406,449 : x
2. Step 2: Convert to fraction form
   190,570.50/406,449 = 406,449/x
3. Step 3: Cross multiply
   190,570.50x = 406,449 × 406,449
4. Step 4: Simplify right side
   190,570.50x = 165,200,789,601
5. Step 5: Solve for x
   x = 165,200,789,601/190,570.50
6. Step 6: Final answer
   x = 866,874.93