Finding the Third Proportional to 139,919.50 and 221,914

Step by Step Solution

1. Step 1: Write the proportion equation
   139,919.50 : 221,914 = 221,914 : x
2. Step 2: Convert to fraction form
   139,919.50/221,914 = 221,914/x
3. Step 3: Cross multiply
   139,919.50x = 221,914 × 221,914
4. Step 4: Simplify right side
   139,919.50x = 49,245,823,396
5. Step 5: Solve for x
   x = 49,245,823,396/139,919.50
6. Step 6: Final answer
   x = 351,958.26