Finding the Third Proportional to 222,663.50 and 485,289

Step by Step Solution

1. Step 1: Write the proportion equation
   222,663.50 : 485,289 = 485,289 : x
2. Step 2: Convert to fraction form
   222,663.50/485,289 = 485,289/x
3. Step 3: Cross multiply
   222,663.50x = 485,289 × 485,289
4. Step 4: Simplify right side
   222,663.50x = 235,505,413,521
5. Step 5: Solve for x
   x = 235,505,413,521/222,663.50
6. Step 6: Final answer
   x = 1,057,674.08