Finding the Third Proportional to 485,311.50 and 1,054,455

Step by Step Solution

1. Step 1: Write the proportion equation
   485,311.50 : 1,054,455 = 1,054,455 : x
2. Step 2: Convert to fraction form
   485,311.50/1,054,455 = 1,054,455/x
3. Step 3: Cross multiply
   485,311.50x = 1,054,455 × 1,054,455
4. Step 4: Simplify right side
   485,311.50x = 1,111,875,347,025
5. Step 5: Solve for x
   x = 1,111,875,347,025/485,311.50
6. Step 6: Final answer
   x = 2,291,055.02