Finding the Third Proportional to 123,156 and 266,554

Step by Step Solution

1. Step 1: Write the proportion equation
   123,156 : 266,554 = 266,554 : x
2. Step 2: Convert to fraction form
   123,156/266,554 = 266,554/x
3. Step 3: Cross multiply
   123,156x = 266,554 × 266,554
4. Step 4: Simplify right side
   123,156x = 71,051,034,916
5. Step 5: Solve for x
   x = 71,051,034,916/123,156
6. Step 6: Final answer
   x = 576,918.99