Finding the Third Proportional to 557,450 and 841,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   557,450 : 841,399.50 = 841,399.50 : x
2. Step 2: Convert to fraction form
   557,450/841,399.50 = 841,399.50/x
3. Step 3: Cross multiply
   557,450x = 841,399.50 × 841,399.50
4. Step 4: Simplify right side
   557,450x = 707,953,118,600.25
5. Step 5: Solve for x
   x = 707,953,118,600.25/557,450
6. Step 6: Final answer
   x = 1,269,984.96