Finding the Third Proportional to 67,434 and 139,224

Step by Step Solution

1. Step 1: Write the proportion equation
   67,434 : 139,224 = 139,224 : x
2. Step 2: Convert to fraction form
   67,434/139,224 = 139,224/x
3. Step 3: Cross multiply
   67,434x = 139,224 × 139,224
4. Step 4: Simplify right side
   67,434x = 19,383,322,176
5. Step 5: Solve for x
   x = 19,383,322,176/67,434
6. Step 6: Final answer
   x = 287,441.38