Finding the Third Proportional to 59,665.50 and 128,673

Step by Step Solution

1. Step 1: Write the proportion equation
   59,665.50 : 128,673 = 128,673 : x
2. Step 2: Convert to fraction form
   59,665.50/128,673 = 128,673/x
3. Step 3: Cross multiply
   59,665.50x = 128,673 × 128,673
4. Step 4: Simplify right side
   59,665.50x = 16,556,740,929
5. Step 5: Solve for x
   x = 16,556,740,929/59,665.50
6. Step 6: Final answer
   x = 277,492.70