Finding the Third Proportional to 139,266 and 212,162

Step by Step Solution

1. Step 1: Write the proportion equation
   139,266 : 212,162 = 212,162 : x
2. Step 2: Convert to fraction form
   139,266/212,162 = 212,162/x
3. Step 3: Cross multiply
   139,266x = 212,162 × 212,162
4. Step 4: Simplify right side
   139,266x = 45,012,714,244
5. Step 5: Solve for x
   x = 45,012,714,244/139,266
6. Step 6: Final answer
   x = 323,213.95