Finding the Third Proportional to 60,400 and 128,108

Step by Step Solution

1. Step 1: Write the proportion equation
   60,400 : 128,108 = 128,108 : x
2. Step 2: Convert to fraction form
   60,400/128,108 = 128,108/x
3. Step 3: Cross multiply
   60,400x = 128,108 × 128,108
4. Step 4: Simplify right side
   60,400x = 16,411,659,664
5. Step 5: Solve for x
   x = 16,411,659,664/60,400
6. Step 6: Final answer
   x = 271,716.22