Finding the Third Proportional to 142,012 and 218,550

Step by Step Solution

1. Step 1: Write the proportion equation
   142,012 : 218,550 = 218,550 : x
2. Step 2: Convert to fraction form
   142,012/218,550 = 218,550/x
3. Step 3: Cross multiply
   142,012x = 218,550 × 218,550
4. Step 4: Simplify right side
   142,012x = 47,764,102,500
5. Step 5: Solve for x
   x = 47,764,102,500/142,012
6. Step 6: Final answer
   x = 336,338.50