Finding the Third Proportional to 64,622 and 139,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,622 : 139,621.50 = 139,621.50 : x
2. Step 2: Convert to fraction form
   64,622/139,621.50 = 139,621.50/x
3. Step 3: Cross multiply
   64,622x = 139,621.50 × 139,621.50
4. Step 4: Simplify right side
   64,622x = 19,494,163,262.25
5. Step 5: Solve for x
   x = 19,494,163,262.25/64,622
6. Step 6: Final answer
   x = 301,664.50