Finding the Third Proportional to 139,660.50 and 303,607.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,660.50 : 303,607.50 = 303,607.50 : x
2. Step 2: Convert to fraction form
   139,660.50/303,607.50 = 303,607.50/x
3. Step 3: Cross multiply
   139,660.50x = 303,607.50 × 303,607.50
4. Step 4: Simplify right side
   139,660.50x = 92,177,514,056.25
5. Step 5: Solve for x
   x = 92,177,514,056.25/139,660.50
6. Step 6: Final answer
   x = 660,011.34