Finding the Third Proportional to 17,760 and 38,904

Step by Step Solution

1. Step 1: Write the proportion equation
   17,760 : 38,904 = 38,904 : x
2. Step 2: Convert to fraction form
   17,760/38,904 = 38,904/x
3. Step 3: Cross multiply
   17,760x = 38,904 × 38,904
4. Step 4: Simplify right side
   17,760x = 1,513,521,216
5. Step 5: Solve for x
   x = 1,513,521,216/17,760
6. Step 6: Final answer
   x = 85,220.79