Finding the Third Proportional to 85,603 and 123,305

Step by Step Solution

1. Step 1: Write the proportion equation
   85,603 : 123,305 = 123,305 : x
2. Step 2: Convert to fraction form
   85,603/123,305 = 123,305/x
3. Step 3: Cross multiply
   85,603x = 123,305 × 123,305
4. Step 4: Simplify right side
   85,603x = 15,204,123,025
5. Step 5: Solve for x
   x = 15,204,123,025/85,603
6. Step 6: Final answer
   x = 177,612.03