Finding the Third Proportional to 142,322 and 309,700

Step by Step Solution

1. Step 1: Write the proportion equation
   142,322 : 309,700 = 309,700 : x
2. Step 2: Convert to fraction form
   142,322/309,700 = 309,700/x
3. Step 3: Cross multiply
   142,322x = 309,700 × 309,700
4. Step 4: Simplify right side
   142,322x = 95,914,090,000
5. Step 5: Solve for x
   x = 95,914,090,000/142,322
6. Step 6: Final answer
   x = 673,923.15