Finding the Third Proportional to 64,321.50 and 139,767

Step by Step Solution

1. Step 1: Write the proportion equation
   64,321.50 : 139,767 = 139,767 : x
2. Step 2: Convert to fraction form
   64,321.50/139,767 = 139,767/x
3. Step 3: Cross multiply
   64,321.50x = 139,767 × 139,767
4. Step 4: Simplify right side
   64,321.50x = 19,534,814,289
5. Step 5: Solve for x
   x = 19,534,814,289/64,321.50
6. Step 6: Final answer
   x = 303,705.83