Finding the Third Proportional to 222,678 and 492,012

Step by Step Solution

1. Step 1: Write the proportion equation
   222,678 : 492,012 = 492,012 : x
2. Step 2: Convert to fraction form
   222,678/492,012 = 492,012/x
3. Step 3: Cross multiply
   222,678x = 492,012 × 492,012
4. Step 4: Simplify right side
   222,678x = 242,075,808,144
5. Step 5: Solve for x
   x = 242,075,808,144/222,678
6. Step 6: Final answer
   x = 1,087,111.47