Finding the Third Proportional to 39,920.34 and 84,708.28

Step by Step Solution

1. Step 1: Write the proportion equation
   39,920.34 : 84,708.28 = 84,708.28 : x
2. Step 2: Convert to fraction form
   39,920.34/84,708.28 = 84,708.28/x
3. Step 3: Cross multiply
   39,920.34x = 84,708.28 × 84,708.28
4. Step 4: Simplify right side
   39,920.34x = 7,175,492,912.33
5. Step 5: Solve for x
   x = 7,175,492,912.33/39,920.34
6. Step 6: Final answer
   x = 179,745.27