Finding the Third Proportional to 222,661.50 and 485,285

Step by Step Solution

1. Step 1: Write the proportion equation
   222,661.50 : 485,285 = 485,285 : x
2. Step 2: Convert to fraction form
   222,661.50/485,285 = 485,285/x
3. Step 3: Cross multiply
   222,661.50x = 485,285 × 485,285
4. Step 4: Simplify right side
   222,661.50x = 235,501,531,225
5. Step 5: Solve for x
   x = 235,501,531,225/222,661.50
6. Step 6: Final answer
   x = 1,057,666.15