Finding the Third Proportional to 223,142 and 490,510

Step by Step Solution

1. Step 1: Write the proportion equation
   223,142 : 490,510 = 490,510 : x
2. Step 2: Convert to fraction form
   223,142/490,510 = 490,510/x
3. Step 3: Cross multiply
   223,142x = 490,510 × 490,510
4. Step 4: Simplify right side
   223,142x = 240,600,060,100
5. Step 5: Solve for x
   x = 240,600,060,100/223,142
6. Step 6: Final answer
   x = 1,078,237.45