Finding the Third Proportional to 142,515 and 302,519.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,515 : 302,519.25 = 302,519.25 : x
2. Step 2: Convert to fraction form
   142,515/302,519.25 = 302,519.25/x
3. Step 3: Cross multiply
   142,515x = 302,519.25 × 302,519.25
4. Step 4: Simplify right side
   142,515x = 91,517,896,620.56
5. Step 5: Solve for x
   x = 91,517,896,620.56/142,515
6. Step 6: Final answer
   x = 642,163.26