Finding the Third Proportional to 222,738 and 485,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   222,738 : 485,686.50 = 485,686.50 : x
2. Step 2: Convert to fraction form
   222,738/485,686.50 = 485,686.50/x
3. Step 3: Cross multiply
   222,738x = 485,686.50 × 485,686.50
4. Step 4: Simplify right side
   222,738x = 235,891,376,282.25
5. Step 5: Solve for x
   x = 235,891,376,282.25/222,738
6. Step 6: Final answer
   x = 1,059,053.13