Finding the Third Proportional to 60,150 and 128,640

Step by Step Solution

1. Step 1: Write the proportion equation
   60,150 : 128,640 = 128,640 : x
2. Step 2: Convert to fraction form
   60,150/128,640 = 128,640/x
3. Step 3: Cross multiply
   60,150x = 128,640 × 128,640
4. Step 4: Simplify right side
   60,150x = 16,548,249,600
5. Step 5: Solve for x
   x = 16,548,249,600/60,150
6. Step 6: Final answer
   x = 275,116.37