Finding the Third Proportional to 302,860.50 and 455,019

Step by Step Solution

1. Step 1: Write the proportion equation
   302,860.50 : 455,019 = 455,019 : x
2. Step 2: Convert to fraction form
   302,860.50/455,019 = 455,019/x
3. Step 3: Cross multiply
   302,860.50x = 455,019 × 455,019
4. Step 4: Simplify right side
   302,860.50x = 207,042,290,361
5. Step 5: Solve for x
   x = 207,042,290,361/302,860.50
6. Step 6: Final answer
   x = 683,622.63