Finding the Third Proportional to 139,193 and 215,185

Step by Step Solution

1. Step 1: Write the proportion equation
   139,193 : 215,185 = 215,185 : x
2. Step 2: Convert to fraction form
   139,193/215,185 = 215,185/x
3. Step 3: Cross multiply
   139,193x = 215,185 × 215,185
4. Step 4: Simplify right side
   139,193x = 46,304,584,225
5. Step 5: Solve for x
   x = 46,304,584,225/139,193
6. Step 6: Final answer
   x = 332,664.60