Finding the Third Proportional to 557,451 and 1,223,172

Step by Step Solution

1. Step 1: Write the proportion equation
   557,451 : 1,223,172 = 1,223,172 : x
2. Step 2: Convert to fraction form
   557,451/1,223,172 = 1,223,172/x
3. Step 3: Cross multiply
   557,451x = 1,223,172 × 1,223,172
4. Step 4: Simplify right side
   557,451x = 1,496,149,741,584
5. Step 5: Solve for x
   x = 1,496,149,741,584/557,451
6. Step 6: Final answer
   x = 2,683,912.56