Finding the Third Proportional to 222,436 and 489,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   222,436 : 489,151.50 = 489,151.50 : x
2. Step 2: Convert to fraction form
   222,436/489,151.50 = 489,151.50/x
3. Step 3: Cross multiply
   222,436x = 489,151.50 × 489,151.50
4. Step 4: Simplify right side
   222,436x = 239,269,189,952.25
5. Step 5: Solve for x
   x = 239,269,189,952.25/222,436
6. Step 6: Final answer
   x = 1,075,676.55