Finding the Third Proportional to 139,811 and 222,385

Step by Step Solution

1. Step 1: Write the proportion equation
   139,811 : 222,385 = 222,385 : x
2. Step 2: Convert to fraction form
   139,811/222,385 = 222,385/x
3. Step 3: Cross multiply
   139,811x = 222,385 × 222,385
4. Step 4: Simplify right side
   139,811x = 49,455,088,225
5. Step 5: Solve for x
   x = 49,455,088,225/139,811
6. Step 6: Final answer
   x = 353,728.16