Finding the Third Proportional to 253,710 and 557,644.50

Step by Step Solution

1. Step 1: Write the proportion equation
   253,710 : 557,644.50 = 557,644.50 : x
2. Step 2: Convert to fraction form
   253,710/557,644.50 = 557,644.50/x
3. Step 3: Cross multiply
   253,710x = 557,644.50 × 557,644.50
4. Step 4: Simplify right side
   253,710x = 310,967,388,380.25
5. Step 5: Solve for x
   x = 310,967,388,380.25/253,710
6. Step 6: Final answer
   x = 1,225,680.46