Finding the Third Proportional to 122,899 and 195,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,899 : 195,418.50 = 195,418.50 : x
2. Step 2: Convert to fraction form
   122,899/195,418.50 = 195,418.50/x
3. Step 3: Cross multiply
   122,899x = 195,418.50 × 195,418.50
4. Step 4: Simplify right side
   122,899x = 38,188,390,142.25
5. Step 5: Solve for x
   x = 38,188,390,142.25/122,899
6. Step 6: Final answer
   x = 310,729.87