Finding the Third Proportional to 266,432 and 557,488

Step by Step Solution

1. Step 1: Write the proportion equation
   266,432 : 557,488 = 557,488 : x
2. Step 2: Convert to fraction form
   266,432/557,488 = 557,488/x
3. Step 3: Cross multiply
   266,432x = 557,488 × 557,488
4. Step 4: Simplify right side
   266,432x = 310,792,870,144
5. Step 5: Solve for x
   x = 310,792,870,144/266,432
6. Step 6: Final answer
   x = 1,166,499.78