Finding the Third Proportional to 123,019.50 and 266,439

Step by Step Solution

1. Step 1: Write the proportion equation
   123,019.50 : 266,439 = 266,439 : x
2. Step 2: Convert to fraction form
   123,019.50/266,439 = 266,439/x
3. Step 3: Cross multiply
   123,019.50x = 266,439 × 266,439
4. Step 4: Simplify right side
   123,019.50x = 70,989,740,721
5. Step 5: Solve for x
   x = 70,989,740,721/123,019.50
6. Step 6: Final answer
   x = 577,060.88