Finding the Third Proportional to 128,935.50 and 197,109

Step by Step Solution

1. Step 1: Write the proportion equation
   128,935.50 : 197,109 = 197,109 : x
2. Step 2: Convert to fraction form
   128,935.50/197,109 = 197,109/x
3. Step 3: Cross multiply
   128,935.50x = 197,109 × 197,109
4. Step 4: Simplify right side
   128,935.50x = 38,851,957,881
5. Step 5: Solve for x
   x = 38,851,957,881/128,935.50
6. Step 6: Final answer
   x = 301,328.63