Finding the Third Proportional to 31,205 and 63,868

Step by Step Solution

1. Step 1: Write the proportion equation
   31,205 : 63,868 = 63,868 : x
2. Step 2: Convert to fraction form
   31,205/63,868 = 63,868/x
3. Step 3: Cross multiply
   31,205x = 63,868 × 63,868
4. Step 4: Simplify right side
   31,205x = 4,079,121,424
5. Step 5: Solve for x
   x = 4,079,121,424/31,205
6. Step 6: Final answer
   x = 130,720.12