Finding the Third Proportional to 63,211 and 139,563

Step by Step Solution

1. Step 1: Write the proportion equation
   63,211 : 139,563 = 139,563 : x
2. Step 2: Convert to fraction form
   63,211/139,563 = 139,563/x
3. Step 3: Cross multiply
   63,211x = 139,563 × 139,563
4. Step 4: Simplify right side
   63,211x = 19,477,830,969
5. Step 5: Solve for x
   x = 19,477,830,969/63,211
6. Step 6: Final answer
   x = 308,139.90