Finding the Third Proportional to 85,124 and 128,870

Step by Step Solution

1. Step 1: Write the proportion equation
   85,124 : 128,870 = 128,870 : x
2. Step 2: Convert to fraction form
   85,124/128,870 = 128,870/x
3. Step 3: Cross multiply
   85,124x = 128,870 × 128,870
4. Step 4: Simplify right side
   85,124x = 16,607,476,900
5. Step 5: Solve for x
   x = 16,607,476,900/85,124
6. Step 6: Final answer
   x = 195,097.47