Finding the Third Proportional to 142,322.50 and 308,021

Step by Step Solution

1. Step 1: Write the proportion equation
   142,322.50 : 308,021 = 308,021 : x
2. Step 2: Convert to fraction form
   142,322.50/308,021 = 308,021/x
3. Step 3: Cross multiply
   142,322.50x = 308,021 × 308,021
4. Step 4: Simplify right side
   142,322.50x = 94,876,936,441
5. Step 5: Solve for x
   x = 94,876,936,441/142,322.50
6. Step 6: Final answer
   x = 666,633.43