Finding the Third Proportional to 85,123 and 128,869

Step by Step Solution

1. Step 1: Write the proportion equation
   85,123 : 128,869 = 128,869 : x
2. Step 2: Convert to fraction form
   85,123/128,869 = 128,869/x
3. Step 3: Cross multiply
   85,123x = 128,869 × 128,869
4. Step 4: Simplify right side
   85,123x = 16,607,219,161
5. Step 5: Solve for x
   x = 16,607,219,161/85,123
6. Step 6: Final answer
   x = 195,096.73