Finding the Third Proportional to 39,906 and 85,144

Step by Step Solution

1. Step 1: Write the proportion equation
   39,906 : 85,144 = 85,144 : x
2. Step 2: Convert to fraction form
   39,906/85,144 = 85,144/x
3. Step 3: Cross multiply
   39,906x = 85,144 × 85,144
4. Step 4: Simplify right side
   39,906x = 7,249,500,736
5. Step 5: Solve for x
   x = 7,249,500,736/39,906
6. Step 6: Final answer
   x = 181,664.43