Finding the Third Proportional to 142,936 and 215,860

Step by Step Solution

1. Step 1: Write the proportion equation
   142,936 : 215,860 = 215,860 : x
2. Step 2: Convert to fraction form
   142,936/215,860 = 215,860/x
3. Step 3: Cross multiply
   142,936x = 215,860 × 215,860
4. Step 4: Simplify right side
   142,936x = 46,595,539,600
5. Step 5: Solve for x
   x = 46,595,539,600/142,936
6. Step 6: Final answer
   x = 325,988.83