Finding the Third Proportional to 67,144 and 90,330

Step by Step Solution

1. Step 1: Write the proportion equation
   67,144 : 90,330 = 90,330 : x
2. Step 2: Convert to fraction form
   67,144/90,330 = 90,330/x
3. Step 3: Cross multiply
   67,144x = 90,330 × 90,330
4. Step 4: Simplify right side
   67,144x = 8,159,508,900
5. Step 5: Solve for x
   x = 8,159,508,900/67,144
6. Step 6: Final answer
   x = 121,522.53