Finding the Third Proportional to 63,939.75 and 139,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,939.75 : 139,327.50 = 139,327.50 : x
2. Step 2: Convert to fraction form
   63,939.75/139,327.50 = 139,327.50/x
3. Step 3: Cross multiply
   63,939.75x = 139,327.50 × 139,327.50
4. Step 4: Simplify right side
   63,939.75x = 19,412,152,256.25
5. Step 5: Solve for x
   x = 19,412,152,256.25/63,939.75
6. Step 6: Final answer
   x = 303,600.69