Finding the Third Proportional to 222,388 and 326,160

Step by Step Solution

1. Step 1: Write the proportion equation
   222,388 : 326,160 = 326,160 : x
2. Step 2: Convert to fraction form
   222,388/326,160 = 326,160/x
3. Step 3: Cross multiply
   222,388x = 326,160 × 326,160
4. Step 4: Simplify right side
   222,388x = 106,380,345,600
5. Step 5: Solve for x
   x = 106,380,345,600/222,388
6. Step 6: Final answer
   x = 478,354.70