Finding the Third Proportional to 120,906 and 173,145

Step by Step Solution

1. Step 1: Write the proportion equation
   120,906 : 173,145 = 173,145 : x
2. Step 2: Convert to fraction form
   120,906/173,145 = 173,145/x
3. Step 3: Cross multiply
   120,906x = 173,145 × 173,145
4. Step 4: Simplify right side
   120,906x = 29,979,191,025
5. Step 5: Solve for x
   x = 29,979,191,025/120,906
6. Step 6: Final answer
   x = 247,954.54