Finding the Third Proportional to 145,272 and 222,132

Step by Step Solution

1. Step 1: Write the proportion equation
   145,272 : 222,132 = 222,132 : x
2. Step 2: Convert to fraction form
   145,272/222,132 = 222,132/x
3. Step 3: Cross multiply
   145,272x = 222,132 × 222,132
4. Step 4: Simplify right side
   145,272x = 49,342,625,424
5. Step 5: Solve for x
   x = 49,342,625,424/145,272
6. Step 6: Final answer
   x = 339,656.82