Finding the Third Proportional to 63,860 and 139,800

Step by Step Solution

1. Step 1: Write the proportion equation
   63,860 : 139,800 = 139,800 : x
2. Step 2: Convert to fraction form
   63,860/139,800 = 139,800/x
3. Step 3: Cross multiply
   63,860x = 139,800 × 139,800
4. Step 4: Simplify right side
   63,860x = 19,544,040,000
5. Step 5: Solve for x
   x = 19,544,040,000/63,860
6. Step 6: Final answer
   x = 306,045.10