Finding the Third Proportional to 60,356 and 128,488

Step by Step Solution

1. Step 1: Write the proportion equation
   60,356 : 128,488 = 128,488 : x
2. Step 2: Convert to fraction form
   60,356/128,488 = 128,488/x
3. Step 3: Cross multiply
   60,356x = 128,488 × 128,488
4. Step 4: Simplify right side
   60,356x = 16,509,166,144
5. Step 5: Solve for x
   x = 16,509,166,144/60,356
6. Step 6: Final answer
   x = 273,529.83