Finding the Third Proportional to 31,488 and 63,884

Step by Step Solution

1. Step 1: Write the proportion equation
   31,488 : 63,884 = 63,884 : x
2. Step 2: Convert to fraction form
   31,488/63,884 = 63,884/x
3. Step 3: Cross multiply
   31,488x = 63,884 × 63,884
4. Step 4: Simplify right side
   31,488x = 4,081,165,456
5. Step 5: Solve for x
   x = 4,081,165,456/31,488
6. Step 6: Final answer
   x = 129,610.18