Finding the Third Proportional to 63,920.25 and 139,504.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,920.25 : 139,504.50 = 139,504.50 : x
2. Step 2: Convert to fraction form
   63,920.25/139,504.50 = 139,504.50/x
3. Step 3: Cross multiply
   63,920.25x = 139,504.50 × 139,504.50
4. Step 4: Simplify right side
   63,920.25x = 19,461,505,520.25
5. Step 5: Solve for x
   x = 19,461,505,520.25/63,920.25
6. Step 6: Final answer
   x = 304,465.42