Finding the Third Proportional to 39,510 and 57,705

Step by Step Solution

1. Step 1: Write the proportion equation
   39,510 : 57,705 = 57,705 : x
2. Step 2: Convert to fraction form
   39,510/57,705 = 57,705/x
3. Step 3: Cross multiply
   39,510x = 57,705 × 57,705
4. Step 4: Simplify right side
   39,510x = 3,329,867,025
5. Step 5: Solve for x
   x = 3,329,867,025/39,510
6. Step 6: Final answer
   x = 84,279.09