Finding the Third Proportional to 142,981 and 308,123

Step by Step Solution

1. Step 1: Write the proportion equation
   142,981 : 308,123 = 308,123 : x
2. Step 2: Convert to fraction form
   142,981/308,123 = 308,123/x
3. Step 3: Cross multiply
   142,981x = 308,123 × 308,123
4. Step 4: Simplify right side
   142,981x = 94,939,783,129
5. Step 5: Solve for x
   x = 94,939,783,129/142,981
6. Step 6: Final answer
   x = 664,002.79