Finding the Third Proportional to 59,210 and 128,140

Step by Step Solution

1. Step 1: Write the proportion equation
   59,210 : 128,140 = 128,140 : x
2. Step 2: Convert to fraction form
   59,210/128,140 = 128,140/x
3. Step 3: Cross multiply
   59,210x = 128,140 × 128,140
4. Step 4: Simplify right side
   59,210x = 16,419,859,600
5. Step 5: Solve for x
   x = 16,419,859,600/59,210
6. Step 6: Final answer
   x = 277,315.65