Finding the Third Proportional to 550,429.50 and 842,053.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,429.50 : 842,053.50 = 842,053.50 : x
2. Step 2: Convert to fraction form
   550,429.50/842,053.50 = 842,053.50/x
3. Step 3: Cross multiply
   550,429.50x = 842,053.50 × 842,053.50
4. Step 4: Simplify right side
   550,429.50x = 709,054,096,862.25
5. Step 5: Solve for x
   x = 709,054,096,862.25/550,429.50
6. Step 6: Final answer
   x = 1,288,183.31