Finding the Third Proportional to 142,168.50 and 300,645

Step by Step Solution

1. Step 1: Write the proportion equation
   142,168.50 : 300,645 = 300,645 : x
2. Step 2: Convert to fraction form
   142,168.50/300,645 = 300,645/x
3. Step 3: Cross multiply
   142,168.50x = 300,645 × 300,645
4. Step 4: Simplify right side
   142,168.50x = 90,387,416,025
5. Step 5: Solve for x
   x = 90,387,416,025/142,168.50
6. Step 6: Final answer
   x = 635,776.67