Finding the Third Proportional to 31,320 and 39,600

Step by Step Solution

1. Step 1: Write the proportion equation
   31,320 : 39,600 = 39,600 : x
2. Step 2: Convert to fraction form
   31,320/39,600 = 39,600/x
3. Step 3: Cross multiply
   31,320x = 39,600 × 39,600
4. Step 4: Simplify right side
   31,320x = 1,568,160,000
5. Step 5: Solve for x
   x = 1,568,160,000/31,320
6. Step 6: Final answer
   x = 50,068.97