Finding the Third Proportional to 59,171 and 128,710

Step by Step Solution

1. Step 1: Write the proportion equation
   59,171 : 128,710 = 128,710 : x
2. Step 2: Convert to fraction form
   59,171/128,710 = 128,710/x
3. Step 3: Cross multiply
   59,171x = 128,710 × 128,710
4. Step 4: Simplify right side
   59,171x = 16,566,264,100
5. Step 5: Solve for x
   x = 16,566,264,100/59,171
6. Step 6: Final answer
   x = 279,972.69