Finding the Third Proportional to 250,685 and 550,978

Step by Step Solution

1. Step 1: Write the proportion equation
   250,685 : 550,978 = 550,978 : x
2. Step 2: Convert to fraction form
   250,685/550,978 = 550,978/x
3. Step 3: Cross multiply
   250,685x = 550,978 × 550,978
4. Step 4: Simplify right side
   250,685x = 303,576,756,484
5. Step 5: Solve for x
   x = 303,576,756,484/250,685
6. Step 6: Final answer
   x = 1,210,988.92