Finding the Third Proportional to 485,280 and 1,054,395

Step by Step Solution

1. Step 1: Write the proportion equation
   485,280 : 1,054,395 = 1,054,395 : x
2. Step 2: Convert to fraction form
   485,280/1,054,395 = 1,054,395/x
3. Step 3: Cross multiply
   485,280x = 1,054,395 × 1,054,395
4. Step 4: Simplify right side
   485,280x = 1,111,748,816,025
5. Step 5: Solve for x
   x = 1,111,748,816,025/485,280
6. Step 6: Final answer
   x = 2,290,942.99