Finding the Third Proportional to 122,809 and 195,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,809 : 195,285.50 = 195,285.50 : x
2. Step 2: Convert to fraction form
   122,809/195,285.50 = 195,285.50/x
3. Step 3: Cross multiply
   122,809x = 195,285.50 × 195,285.50
4. Step 4: Simplify right side
   122,809x = 38,136,426,510.25
5. Step 5: Solve for x
   x = 38,136,426,510.25/122,809
6. Step 6: Final answer
   x = 310,534.46