Finding the Third Proportional to 139,812 and 222,386

Step by Step Solution

1. Step 1: Write the proportion equation
   139,812 : 222,386 = 222,386 : x
2. Step 2: Convert to fraction form
   139,812/222,386 = 222,386/x
3. Step 3: Cross multiply
   139,812x = 222,386 × 222,386
4. Step 4: Simplify right side
   139,812x = 49,455,532,996
5. Step 5: Solve for x
   x = 49,455,532,996/139,812
6. Step 6: Final answer
   x = 353,728.81