Finding the Third Proportional to 60,329.50 and 128,669

Step by Step Solution

1. Step 1: Write the proportion equation
   60,329.50 : 128,669 = 128,669 : x
2. Step 2: Convert to fraction form
   60,329.50/128,669 = 128,669/x
3. Step 3: Cross multiply
   60,329.50x = 128,669 × 128,669
4. Step 4: Simplify right side
   60,329.50x = 16,555,711,561
5. Step 5: Solve for x
   x = 16,555,711,561/60,329.50
6. Step 6: Final answer
   x = 274,421.49