Finding the Third Proportional to 128,985.75 and 195,429.38

Step by Step Solution

1. Step 1: Write the proportion equation
   128,985.75 : 195,429.38 = 195,429.38 : x
2. Step 2: Convert to fraction form
   128,985.75/195,429.38 = 195,429.38/x
3. Step 3: Cross multiply
   128,985.75x = 195,429.38 × 195,429.38
4. Step 4: Simplify right side
   128,985.75x = 38,192,640,612.89
5. Step 5: Solve for x
   x = 38,192,640,612.89/128,985.75
6. Step 6: Final answer
   x = 296,099.69