Finding the Third Proportional to 31,128 and 45,540

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128 : 45,540 = 45,540 : x
2. Step 2: Convert to fraction form
   31,128/45,540 = 45,540/x
3. Step 3: Cross multiply
   31,128x = 45,540 × 45,540
4. Step 4: Simplify right side
   31,128x = 2,073,891,600
5. Step 5: Solve for x
   x = 2,073,891,600/31,128
6. Step 6: Final answer
   x = 66,624.63