Finding the Third Proportional to 142,944 and 210,136

Step by Step Solution

1. Step 1: Write the proportion equation
   142,944 : 210,136 = 210,136 : x
2. Step 2: Convert to fraction form
   142,944/210,136 = 210,136/x
3. Step 3: Cross multiply
   142,944x = 210,136 × 210,136
4. Step 4: Simplify right side
   142,944x = 44,157,138,496
5. Step 5: Solve for x
   x = 44,157,138,496/142,944
6. Step 6: Final answer
   x = 308,912.15