Finding the Third Proportional to 222,662.50 and 485,287

Step by Step Solution

1. Step 1: Write the proportion equation
   222,662.50 : 485,287 = 485,287 : x
2. Step 2: Convert to fraction form
   222,662.50/485,287 = 485,287/x
3. Step 3: Cross multiply
   222,662.50x = 485,287 × 485,287
4. Step 4: Simplify right side
   222,662.50x = 235,503,472,369
5. Step 5: Solve for x
   x = 235,503,472,369/222,662.50
6. Step 6: Final answer
   x = 1,057,670.12