Finding the Third Proportional to 225,654 and 490,210

Step by Step Solution

1. Step 1: Write the proportion equation
   225,654 : 490,210 = 490,210 : x
2. Step 2: Convert to fraction form
   225,654/490,210 = 490,210/x
3. Step 3: Cross multiply
   225,654x = 490,210 × 490,210
4. Step 4: Simplify right side
   225,654x = 240,305,844,100
5. Step 5: Solve for x
   x = 240,305,844,100/225,654
6. Step 6: Final answer
   x = 1,064,930.58