Finding the Third Proportional to 222,816 and 331,488

Step by Step Solution

1. Step 1: Write the proportion equation
   222,816 : 331,488 = 331,488 : x
2. Step 2: Convert to fraction form
   222,816/331,488 = 331,488/x
3. Step 3: Cross multiply
   222,816x = 331,488 × 331,488
4. Step 4: Simplify right side
   222,816x = 109,884,294,144
5. Step 5: Solve for x
   x = 109,884,294,144/222,816
6. Step 6: Final answer
   x = 493,161.60