Finding the Third Proportional to 133,144 and 289,800

Step by Step Solution

1. Step 1: Write the proportion equation
   133,144 : 289,800 = 289,800 : x
2. Step 2: Convert to fraction form
   133,144/289,800 = 289,800/x
3. Step 3: Cross multiply
   133,144x = 289,800 × 289,800
4. Step 4: Simplify right side
   133,144x = 83,984,040,000
5. Step 5: Solve for x
   x = 83,984,040,000/133,144
6. Step 6: Final answer
   x = 630,776.00