Finding the Third Proportional to 222,300 and 485,420

Step by Step Solution

1. Step 1: Write the proportion equation
   222,300 : 485,420 = 485,420 : x
2. Step 2: Convert to fraction form
   222,300/485,420 = 485,420/x
3. Step 3: Cross multiply
   222,300x = 485,420 × 485,420
4. Step 4: Simplify right side
   222,300x = 235,632,576,400
5. Step 5: Solve for x
   x = 235,632,576,400/222,300
6. Step 6: Final answer
   x = 1,059,975.60