Finding the Third Proportional to 133,126.50 and 289,581

Step by Step Solution

1. Step 1: Write the proportion equation
   133,126.50 : 289,581 = 289,581 : x
2. Step 2: Convert to fraction form
   133,126.50/289,581 = 289,581/x
3. Step 3: Cross multiply
   133,126.50x = 289,581 × 289,581
4. Step 4: Simplify right side
   133,126.50x = 83,857,155,561
5. Step 5: Solve for x
   x = 83,857,155,561/133,126.50
6. Step 6: Final answer
   x = 629,905.81