Finding the Third Proportional to 59,812 and 128,839

Step by Step Solution

1. Step 1: Write the proportion equation
   59,812 : 128,839 = 128,839 : x
2. Step 2: Convert to fraction form
   59,812/128,839 = 128,839/x
3. Step 3: Cross multiply
   59,812x = 128,839 × 128,839
4. Step 4: Simplify right side
   59,812x = 16,599,487,921
5. Step 5: Solve for x
   x = 16,599,487,921/59,812
6. Step 6: Final answer
   x = 277,527.72