Finding the Third Proportional to 59,538.50 and 128,425

Step by Step Solution

1. Step 1: Write the proportion equation
   59,538.50 : 128,425 = 128,425 : x
2. Step 2: Convert to fraction form
   59,538.50/128,425 = 128,425/x
3. Step 3: Cross multiply
   59,538.50x = 128,425 × 128,425
4. Step 4: Simplify right side
   59,538.50x = 16,492,980,625
5. Step 5: Solve for x
   x = 16,492,980,625/59,538.50
6. Step 6: Final answer
   x = 277,013.71