Finding the Third Proportional to 133,285.50 and 289,170

Step by Step Solution

1. Step 1: Write the proportion equation
   133,285.50 : 289,170 = 289,170 : x
2. Step 2: Convert to fraction form
   133,285.50/289,170 = 289,170/x
3. Step 3: Cross multiply
   133,285.50x = 289,170 × 289,170
4. Step 4: Simplify right side
   133,285.50x = 83,619,288,900
5. Step 5: Solve for x
   x = 83,619,288,900/133,285.50
6. Step 6: Final answer
   x = 627,369.74