Finding the Third Proportional to 64,309.50 and 139,311

Step by Step Solution

1. Step 1: Write the proportion equation
   64,309.50 : 139,311 = 139,311 : x
2. Step 2: Convert to fraction form
   64,309.50/139,311 = 139,311/x
3. Step 3: Cross multiply
   64,309.50x = 139,311 × 139,311
4. Step 4: Simplify right side
   64,309.50x = 19,407,554,721
5. Step 5: Solve for x
   x = 19,407,554,721/64,309.50
6. Step 6: Final answer
   x = 301,783.64